Sentence Correction

According to a study published by Dr. Myrna Weissman, only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four.

(A) only one percent of Americans born before 1905 had suffered major depression by the age of seventy-five; of those born since 1955, six percent had become depressed by age twenty-four

(B) only one percent of Americans born before 1905 suffer major depression by the age of seventy-five; if they are born since 1955, six percent become depressed by age twenty-four

(C) of Americans born before 1905, only one percent of them have suffered major depression by age seventy-five, but six percent of those born since 1955 do by the age of twenty-four

(D) major depression is suffered by the age of seventy-five by only one percent of Americans born before 1905, and by age twenty-four by the six percent born since 1955

(E) Americans born before 1905 suffer major depression by the age of seventy-five only one percent of the time, but six percent of those born since 1955 did so by age twenty-four

What is your Answer ?

A?

My Answer would be A.

This is "had suffered", past perfect. This tense should be maintained throughout the sentence.

Choice B can be crossed out as it is using incorrect tense "suffer".

Choice C "have suffered" again neither past, nor past perfect.

Choice D Too complex - I think

Choice E Incorrect Tense again "suffer"

Therefore, Choice A seems to be the most accurate answer.

Please correct me if I've misjudged any facts. Hope this helps!

IMO A

A for me too.

Official Answer is "A". Thanks Guys.

Will post more questions today.

A - Is the second part of the sentence, after semicolon, capable of standing on its own.
I doubt. It seems to be a run on sentence.
hence A cannot be the correct answer.



Thanks!

Just bumping this thread up...In answer choice (A). I do realize that the second part can stand on it's own because it has a "Subject" and a "working verb" . But then is it alright to make it stand on its own? I mean isnt it a part of Dr. Myrna Weissman's study? And can a pronoun "of those" refer to a antecedent from an separate independent clause???

Please help
thnq