Although there is still disagreement among the scientific

[BTGmoderatorDC]

Although there is still disagreement among the scientific community, some research suggests that the reason people yawn is because doing so increases blood flow and cools the brain.


A. among the scientific community, some research suggests that the reason people yawn is because doing so increases blood flow and cools

B. among the scientific community, some research suggests that the reason people yawn is that yawning increases blood flow, cooling

C. between the scientific community, some research suggests that the reason people yawn is that yawning increases blood flow and cools

D. within the scientific community, some research suggests that people yawn because by doing so, blood flow increases, thereby cooling

E. in the scientific community, some research suggests that the reason people yawn is because the act of yawning increases blood flow, thereby cooling

OA B

Source: Manhattan Prep

[deloitte247]

OPTION A - INCORRECT
Notice that the answer choice (B) changes the reason is... because to the reason... that.
The structure has the reason ... because may sound fine, but it's actually redundant. The reason already indicates that you are about to hear causal explanation; because conveys the same idea.

OPTION B - CORRECT
This sentence changes the reason is... because in the initial sentence to the reason... that, removing teh redundancy. Both cools and cooling are correct; this split is a red herring.

OPTION C - INCORRECT
Between cannot be used to refer to the scientific community, which has more than two members.

OPTION D - INCORRECT
By removing 'reason', this sentence fixes the redundancy in the original sentence. However, the new construction introduces a modifier error. The modifier by doing so (yawning) must be followed by whoever is doing the yawning. In answe choice (D), by doing so (yawning), blood flow implies that the blood flow is yawning.

OPTION E - INCORRECT
The reason ... because is redundant. The reason already indicates that you are about to hear a causal explanation; because it conveys the same idea.