I think the answer is (b)
I believe the answer is A. I am sorry if it isn't right.
Answer:
<em>D. A memoir written by British prime minister Margaret Thatcher about her career</em>
Harriet tubman, along with others, helped other slaves escape to the north. the people went to the north and found new lives and settled down. the underground railroad helped slaves escape from slavery and find new places to go where people would help them rather than enslave them.
