ok sure though why do you want us to do it?
I think that the answer is:
C. Yes, because she presents multiple statistics that indicate a clear distinction between men's and women's earnings.
You did not provide the possible excerpts, however, nonstandard English is any type of English language that is not standardized, meaning that is not grammatical or normative. Slang, jargon, incorrect grammar, dialects, all fall into the category of nonstandard English, so use that logic on your excerpts and find the correct one.
C. Combine the sentences to condense the repetitive info. about inprovement.
