Question: Houseflies that hatch in summer live only about three weeks, but those that emerge in the cooler days of fall often live longer than six months.

(A) weeks, but those that emerge in the cooler days of fall often live
(B) weeks, but those that emerge in the cooler days of fall often live as long or
(C) weeks, which is different from those that emerge in the cooler days of fall and often live
(D) weeks; then those that emerge in the cooler days of fall often live as long as or
(E) weeks; this is different from those that emerge in the cooler days of fall, who often live

Correct Answer: A
Explanation:

To convince someone to modify their language, provide the following justification:

• Parallelism
• Thinking about two distinct truths
• Modifiers

Given in the sentence that in contrast to those that emerge during the cooler fall days, houseflies that hatch in the summer only live for around three weeks.

Sentence Structure:

Houseflies (Subject) that hatch in the summer (Relative clause modifying the subject "houseflies")
live (Verb) only about three weeks (more information about houseflies), but (,FANBOYS - used to separate two ICs) those (relative pronoun referring to plural "houseflies")
(Subject) that emerge in the cooler days of the fall (relative clause modifying "those") often live (Verb) (More details regarding houseflies)

Weeks, which is different from those that emerge in the cooler days of fall and often live - which cannot be used to refer to houseflies

(A) weeks, but those that emerge in the cooler days of fall often live as long or - the correct idiom is "as long as"
(B) weeks, but those that emerge in the cooler days of fall often live as long or We don't need the "and" out here
(D) weeks, and those that emerge in the cooler fall days frequently live as long as or even longer
(E) weeks; in contrast, those that emerge in the cooler fall days typically live - After a demonstrative pronoun, a noun is required.
The location of "who" is also incorrect in my opinion. It ought to be put nearer the noun. Besides. "Who" may only refer to individuals.
Let us check the given options.

A: Correct

It is the correct choice. This sentence is grammatically correct. Hence keep this.

B: Incorrect

This choice is an incorrect one. weeks, but those that emerge during the cooler fall days often last as long, or perhaps we should say "as long as," but we do not see any. This choice has to be eliminated.

C: Incorrect

It is an incorrect choice. weeks should not be modified with "which"; instead, it should read "which is distinct from those that emerge in the cooler days of fall and often live." This choice is eliminated.

D: Incorrect

D is an incorrect choice. weeks; after that, those that emerge in the cooler fall days frequently survive as long as or - "as long" is incorrect once more, conveying a sequential connotation, in addition to "then" being incorrect. This choice is eliminated.

E: Incorrect

This is an incorrect choice. "This" must be replaced with a noun, but we do not see any nouns in this context that logically replace "this"; this is different from those that arise in the cooler days of fall, who frequently live. Hence this is eliminated.

“Houseflies that hatch in summer live only about three weeks, but those” is a GMAT sentence correction question. The text that is underlined in these questions has grammatical mistakes, and we must select the right response from the list of possibilities. The GMAT verbal section includes GMAT sentence correction.

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