The correct answer is "A".
There is a growing tendency from the admissions offices of colleges to focus on aspects of candidates besides there academic background. Leadership skills, as well as solidarity, are personal traits which are sought by these colleges whenever they are reviewing candidates. Therefore, by having recorded proof of any of these, a candidate greatly increases his or her chances of getting admitted.
If you accept either C or D as the correct revision then you have to accept both of them. Hence the best way to treat the sentence is to ignore both of them.
B is not correct either. You can over punctuate.
That leaves A.
Sometimes the right answer to many things is to do nothing. My dad used to say "Don't fix what isn't broke."
A is the answer <<<<<
Mrs. Mallards excitement at the prospect of a new life
The answer is the Black Guelphs
Colons. The colon is a stronger punctuation mark than the semicolon. As a result, within sentences, it is used only after a complete sentence--never after a dependent clause or phrase.
