Hello Everyone!
Let's take a look at this sentence, one issue at a time, to determine which option is the right answer! First, here's the original question, with the major differences between options highlighted in orange:
A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.
(A) claims suggest that the economy might not be as weak as some analysts previously thought
(B) claims suggests that the economy might not be so weak as some analysts have previously thought
(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts
(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts
(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts
A quick glance over the options tells us we have 2 major issues to deal with:
1. Verb Tense: suggest / suggests / suggesting
2. Active vs. Passive Voice: some analysts previously thought / previously thought by some analysts
Let's start with #1 on our list: verb tense. We need to make sure that the verb agrees with the subject, and that we're not creating an accidental sentence fragment:
(A) claims suggest that the economy might not be as weak as some analysts previously thought
This is OKAY because it uses a plural verb for a plural subject (A surge in new home sales and a drop in weekly unemployment claims).
(B) claims suggests that the economy might not be so weak as some analysts have previously thought
This is INCORRECT because it uses a singular verb for a plural subject, which doesn't agree in number!
(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts
This is OKAY because it uses a plural verb for a plural subject (A surge in new home sales and a drop in weekly unemployment claims).
(D) claims, suggesting about the economy that it might not be so weak as previously thought by some analysts
This is INCORRECT because by changing "suggest" to the gerund "suggesting," it eliminates the verb from the sentence - making this a sentence fragment!
(E) claims, suggesting the economy might not be as weak as previously thought to be by some analysts
This is INCORRECT because by changing "suggest" to the gerund "suggesting," it eliminates the verb from the sentence - making this a sentence fragment!
We can eliminate options B, D, and E because they don't use the right verb tense/form to agree with the subject.
Now that we're left with 2 options, let's take a look at #2 on our list: active vs. passive voice. Whenever possible, we MUST use active voice over passive voice. Active voice is clearer, less wordy, and always preferred on the GMAT.
(A) claims suggest that the economy might not be as weak as some analysts previously thought
This is CORRECT! It uses the correct verb tense (suggest) and uses active voice!
(C) claims suggest that the economy might not be as weak as have been previously thought by some analysts
This is INCORRECT because it uses passive voice instead of active voice, which is a major no-no on the GMAT!
There you go - option A was the correct choice all along!
Don't study for the GMAT. Train for it.