Harriet Tubman was an African American slave. She first risked her life when she developed the "Underground Railroad", which was a secret system that she created in order to help fugitive slaves escape. The second way that she risked her life was becoming a nurse during the Civil War.
The answer is:<span>In English grammar, an imperative sentence is a type of sentence that gives advice or instructions or that expresses a request or command. (Compare with sentencesthat make a statement, ask a question, or express an exclamation.) ... An imperative sentence ends with a period or an exclamation point. so A</span>
It was mainly the construction of railroads that helped cities thrive in the 1800s, while it was mostly the invention of the television that <span>had the most significant impact on the rise of mass entertainment in the late nineteenth century</span>.
Shay's Rebellion hope this helps :)
