Answer: C doesn't refer to any word in the sentence.
Explanation: is a phrase or clause that is not clearly and logically related to the word or words it modifies
B.
There have been times in history when violence was necessary to resolve mankind’s problems, but the Civil Rights Movement is not one of those moments.
Answer:
b. it is weak because it does not provide details about Harriet Tubman's life.
Explanation:
I think that's pretty self explanatory.
More people use it as an adverb but can also be a adjective