When ethnic groups intermarry, it is likely to result in cognitive benefits; indeed, perhaps already having contributed to the Flynn effect, which has been the worldwide rise in average IQ score by as much as three points per decade over most of the past century.

A) When ethnic groups intermarry, it is likely to result in cognitive benefits; indeed, perhaps having contributed to the Flynn effect, which has been : Dangling modifier. Not sure to what it is referring to.

B) The intermarriage of ethnic groups is likely to result in cognitive benefits and may indeed have contributed to the Flynn effect,

C) When ethnic groups intermarry, they are likely to result in cognitive benefits and may indeed have contributed to the Flynn effect, the name given to : Change in meaning + "the name given" is wordy
D) Ethnic groups that intermarry will likely result in cognitive benefits; indeed, possibly having contributed to the Flynn effect, : Same as A

E) The intermarriage of ethnic groups, likely to result in cognitive benefits, indeed have possibly contributed to the Flynn effect, the name given to : Same as A
_________________

Merged topics. Please, search before posting questions!
_________________

When ethnic groups intermarry, it is likely to result in cognitive benefits; indeed, perhaps already having contributed to the Flynn effect, which has been the worldwide rise in average IQ score by as much as three points per decade over most of the past century.

(A) When ethnic groups intermarry, it is likely to result in cognitive benefits; indeed, perhaps having contributed to the Flynn effect, which has been (It has no clear antecedent and the clause after semicolon is not a independent clause which we require )

(B) The intermarriage of ethnic groups is likely to result in cognitive benefits and may indeed have contributed to the Flynn effect, (Correct)

(C) When ethnic groups intermarry, they are likely to result in cognitive benefits and may indeed have contributed to the Flynn effect, the name given to (Wrong meaning)

(D) Ethnic groups that intermarry will likely result in cognitive benefits; indeed, possibly having contributed to the Flynn effect, (No independent clause and wrong meaning in Ethnic groups that intermarry will likely.... )

(E) The intermarriage of ethnic groups, likely to result in cognitive benefits, indeed have possibly contributed to the Flynn effect, the name given to (S-V agreement and wrong modifier likely to result is modifying ethnic groups ,which is wrong )

Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________