I do not understand the question.
The answer would be A.
The question you have to ask is, is it possessive?
Yes it is possessive.
The wing is owned by the bird. Its wing was broken.
It's means it is or it has.
It's would not make sense in this case because you can not put it is or it has into this sentence.
Answer:
The answer is C. Women are not adequately represented in U.S. monuments. “‘Why not continue Bly's work, she thought, by bringing visibility to some of these women so rarely depicted in public sculpture?’”
