Sentence Correction

Researchers are using computer images to help surgeons plan difficult operations and to
develop programs that will work for doctors and nurses in the same way that flight
simulators do for pilots, letting medical personnel practice their techniques and test their
reflexes before they ever see a patient.

A. plan difficult operations and to develop programs that will work for doctors and
nurses in the same way that flight simulators do

B. plan difficult operations and develop programs to work for doctors and nurses the
same way as with flight simulators

C. to plan difficult operations and to develop programs that will work for doctors and
nurses like flight simulators

D. plan difficult operations and in developing programs to work for doctors and
nurses the same way as flight simulators

E. to plan difficult operations and developing programs that will work for doctors
and nurses like flight simulators do

OA is A

This one is a bit difficult for me especially A,B, and C. Please explain how can i eliminate B and C.

Regards
Sachin

[email protected] wrote: 2) Comparisons - the first part of the comparison states how computer images are used to HELP surgeons. The second part of the sentence offers a comparison to how flight simulators similarly HELP pilots. The sentence needs a verb to properly complete the comparison. Eliminate C.
Rich

Thanks for your reply.

If sentence needs a verb, then it doesn't need like, and in that case sentence needs AS . Is that correct ?

Regards
Sachin

Here the participle phrase "letting medical personnel..." presents the result of the sentence for which the subject is "programs".
programs will work for doctors and nurses in the same way flight simulators do for pilots, letting medical personnel...
Only options A, C and E present 'programs' as the subject of the relative 'that' clause.

C has improper comparison with like, also improper usage of 'for pilots'
E developing is not parallel with the either of the 'to+infivitive' forms

Experts, please confirm if my understanding is correct.

Hello Mitch

Researchers are using computer images to help surgeons plan difficult operations and to
develop programs that will work for doctors and nurses in the same way that flight
simulators do for pilots, letting medical personnel practice their techniques and test their
reflexes before they ever see a patient.

2 questions

1. to help surgeons and to help develop programs is also parallel. So we dont need a "to" with develop programs. I am confused on when we see parallelism how should be break the sentence. I typically look for first verb which is common to both parts - which here is help and not using.

so what i am saying is

Researchers are using computer images to help (surgeons plan difficult operations and
develop programs) that will work for doctors and nurses in the same way that flight
simulators do for pilots, letting medical personnel practice their techniques and test their
reflexes before they ever see a patient.

2. letting medical personnel practise - you mentioned in one of your posts that +ing modifies the first preceding subject. Here the first preceeding subject is flight simulators. Is this modification correct ? (has to be as its gmac)

Hi Rich
Have a doubt with parallelism in this question.
I went for B thinking that "to help surgeons plan...and to develop programs" Vs "to help surgeons plan and develop programs" should be one and the same with no parallel errors as we are dealing with a conjunction "and" and not with correlative conjunctions in which rules get stricter. Pls can you correct my understanding on this. Tx.

[email protected] wrote:Hi Sachin,

This SC is primarily about Parallelism rules (with a Comparison rule thrown in).

1) Parallelism - the sentence states that "Researchers are using computer images.....(to do 2 things)." The first is "to help surgeons...." so the second should also be " and to.....'something'. Eliminate B, D and E.

2) Comparisons - the first part of the comparison states how computer images are used to HELP surgeons. The second part of the sentence offers a comparison to how flight simulators similarly HELP pilots. The sentence needs a verb to properly complete the comparison. Eliminate C.

Final Answer: A

GMAT assassins aren't born, they're made,
Rich