Recent psychological studies indicate that if children

My Pick ....NONE OF THE options are CORRECT.

What banaerjeea has pointed about option D is VERY MUCH correct but at the same time in option B "DEVELOP QUICKER" is not only ABSURD but also COMPLETELY ILLOGICAL.

B for me. it's parallel.
they experience fewer psychological problems and develop quicker socially than do

D is not parallel in comparison between two verb tenses.

Don't agree with you Chunjuwu.

First of all rule is if X happens Y will happen.
Secondly, there is nothing wrong with verb parallelism.

I think "D" has problems.....we are comparing effect on two types of children in future tense, that means the second type should also include future tense and not simple present.... this wud have been correct.


they will experience fewer psychological problems and [will] develop more quickly socially than will

OK I figured what the problem with D is....
its split infinitive....

develop more quickly socially than do...vs develop quicker socially

develop "more" in D splits the verb from the subject....B is better...

B it is...I can bet my money on it!

D
will is prefered coz it indicates a rule. "more quickly" is preferred see OG Q 46.

As far as this RULE is Concern Remember we have DO in D.

So that D is also wrong as rightly pointed by Banerjee

OA is D

Spot the Concept Being Tested:
Pronouns: Look for pronouns in the underlined part.
In this case the pronoun they・is used to refer to children.

Lists: Look for multiple similar ideas, for conjunctions, or for multiple descriptions.
In this case there are two lists.
The first is associate ... and play ...The second is experience ... and develop ...
Comparisons: Look for comparative triggers.
In this case quicker ... than indicates a comparison between the children.

Decide on a Fix:
The rule for Pronouns is that the pronoun must clearly and correctly refer to one thing.
In this case the pronoun they could technically also refer to studies, but where there is ambiguity between a person and a thing when using they on the GMAT the test assumes it refers to the person.
So the pronoun is fine.
The rule for Comparisons is that the comparison must be of comparable items and must be balanced.
In this case the comparison quicker than could only apply to the children.
It would refer to their speed.
This is not the intent of the sentence.
The correct comparison should compare the development of the children.
Therefore the correct comparison should be more quickly than.
The rule for Lists is that the list must be of similar items and balanced.
The first list is of two verbs in the same time frame that are similarly constructed.
It is fine.
The second list is also of two verbs in logically consistent time frames and of similar construction.
It is also fine.

POE:
Use the Comparison Error to eliminate choices.
Only Choice D and Choice E make the valid comparison of verb to verb.
Eliminate A, B and C.

Chunk and Compare:
Compare D to E.
The first difference is play in Choice D versus played in Choice E.
Choice E changes the first list to make in unbalanced.
Eliminate E.

Reread Sentence With Your Choice and Choose an Answer.
Choose D.

I am still not clear. Let take B&D here:
(B) play with other children, they experience fewer psychological problems and develop quicker socially than do
(D) play with other children, they will experience fewer psychological problems and develop more quickly socially than do
I think both B&D use correct comparison because this is referred to "experience" and "develop"
What is different is in bold. There is 2 differences:
First, verb tense: present (experience) in B and future (will experience) in D. Second, "develop quicker socially" in B and "develop more quickly socially" in D
In both cases, D is better.

For me the difference between B and D is is the use of IF..then will.

Can someone please explain the option D over option B

Can some expert please explain this question? Thank you

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