In 1946,Eleanor Roosevelt served as a chair of the United Nation Commission on Human Rights
The answer is D. die for what they believe in
I would say A or C would fit the role a topic sentence should play. Simply because B doesn't make sense unless given context with A. D doesn't make sense unless given context from A. So because of the lack of context between B and D if put in the first sentence, I would narrow it down to A or C. I'm assuming there is a was in between "Barbara" and "tired" within the first sentence. Hope that helps.
D. The plane flew through many clouds. "Through" is the preposition, so "through many clouds" is the prepositional phrase.
The word i would use is <span>ignoramus.</span>