I believe D would be the most reasonable answer for this question given that it has factual information that well suits a topic sentence.
I think this because of her courage to fight for girl’s education rights. She inspired many people to do so as well, making her one of the worlds famous women leaders. Despite getting shot in the head, she never stopped
I would say the correct answer is that has an undetermined answer.If a subject has been thoroughly covered, then there is no need for this researcher to do it all over again. If it's impossible to answer, there is no need to try. If it can be answered easily, then it doesn't really require a research. This leaves us with the last option, because a researcher might want to try and determine the answer.
We tried the museum, it was closed
