Sentence Correction

As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful, since it is primarily prescriptions that attract the customers, who then also buy other health-related items.

A. As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful
B. As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success
C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore
D. As traditional pharmacies, so online drugstores rely on prescriptions to be successful
E. Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions

OA:Spoiler CodeC

showbu wrote:As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful, since it is primarily prescriptions that attract the customers, who then also buy other health-related items.

A. As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful
B. As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success
C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore
D. As traditional pharmacies, so online drugstores rely on prescriptions to be successful
E. Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions

D

As ..So is Idiomatic

Like X, Y with X and Y logically and grammtically parallel

E violates this

showbu wrote:As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful, since it is primarily prescriptions that attract the customers, who then also buy other health-related items.

A. As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful
B. As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success
C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore
D. As traditional pharmacies, so online drugstores rely on prescriptions to be successful
E. Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions

OA:Spoiler CodeC

I have trouble understanding the structure of B - "As with the case with traditional pharmacies" - what kind of modifier is this. Can someone explain this with some more example pls.

1. Comparison is under question here. As X, Y (X and Y need to be parallel, and preferably clauses(Sub+Verb); Like is used to compare nouns.

A: "it" - pronoun error - there is no singular reference to any noun
B: As noun, noun ; Like is preferred; to have success is weird also
C: As + verb(is) + subject (traditional pharmacies), prescriptions+ verb (Are) + subject (online drug store)
This is in line with the As X, Y where X and Y are clauses
D: As noun, noun
E: Like Noun, Wrong comparison (cornerstone)- if this had been Like Traditional pharmacies, Online drugstores...then it would have been correct

So C.

C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore

Can someone help me out with this. Shouldn't online drugstores be after the comma thus correcting the modifier error?

very good quesiton from gmatprep, the climax of comparison. only this question teach us all of comparision

in E, pharmacy can not be compare with cornerstone logically
in D, it is not logic to say drugstore is in capacity of pharmacies
in A, "it" have no referent
in B, "as with..." can not stand for " drugstore is with". a good example is "as with the hat , he is with the tie" is correct. I call this case ILLIPSIS IN COMPARISION. ILLISPSIS IN COMPARISON is impossible here.

we have 3 error for comparision( remember all of three errors are grammatical but not logic)

1, compare 2 noun which are not comparable logically-above example
2, compare 2 action which are not comparable logically. for example
she dances as she eats ..is wrong. but " she dances as she walks" is correct.
3, us illipsis comparision wrongly-above example

we now no more fear of comparision.



a

A. As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful

B. As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success

C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore

D. As traditional pharmacies, so online drugstores rely on prescriptions to be successful

E. Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions - wrong comparison

Hence IMO C.

Is it correct if i write D as

"As traditional pharmacies, so do online stores rely on blah to be blah blah"

HSPA wrote:Is it correct if i write D as

"As traditional pharmacies, so do online stores rely on blah to be blah blah"

No, as is used to compare clauses.
Like is used to compare noun/noun phrases.

In your case,
As traditional pharmacies= this is noun !!! use Like.

showbu wrote:As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful, since it is primarily prescriptions that attract the customers, who then also buy other health-related items.

A. As it is with traditional pharmacies, online drugstores rely on prescriptions to be successful
B. As with the case of traditional pharmacies, online drugstores rely on prescriptions to have success
The comma, after the underlined portion in question, followed by since makes the sentence awkward.
C. As is the case with traditional pharmacies, prescriptions are the cornerstone of a successful online drugstore
D. As traditional pharmacies, so online drugstores rely on prescriptions to be successful
As X, so Y - awkward.
E. Like traditional pharmacies, the cornerstone of a successful online drugstore is prescriptions
Like cannot be used with traditional pharmacies.
OA:Spoiler CodeC

Between A and E, I found A to be wordy and not succint over C.

Thus C.

AIM GMAT, Can you help me understand what is the problem with 'to be'?