Hello. You did not inform the text to which this question is related, did not inform the answer options and did not inform the question of Part A. This leaves your question without context and cannot be answered correctly. However, I will try to help you in the best possible way.
First you must find the answer of Part A and then you must observe, among the answer options of Part B, which sentences promote a justification for the answer of Part A, that is, which sentences of Part B, which justify , support and reinforce the sentence selected in Part A, giving veracity and reliability to your answer.