C. Combine it with a sentence fragment
B is correct "A social commentator, who explains what a book says about people in general."
I’m not sure what the certain scenario is for this question, but I do know “liberation” means “free from imprisonment”. Perhaps the character has achieved something that has been holding them back from success, or cut off ties from someone who influences them negatively, or quite literally escaped something/someone that had captured them. I hope this helped.
The answer is (A) It would focus more on the social implications of the racial conflict.
Sorry if I'm a little late!!