Harriet Tubman is well known for risking her life as a conductor on the Underground Railroad, which led escaped slaves to freedom in the North. But the former slave also served 1 a spy for the Union during the Civil War and was the first woman in American history to lead a military expedition – and successful one at that. During a time when women were usually 2 to traditional roles like 3 side-by-side with men, says writer Tom Allen, who tells her exciting story in the book Harriet Tubman: Secret Agent.
4 to help the Union Army because she wanted freedom for all of the people who were forced into slavery, not just the few she could help by herself. And she convinced many other brave African Americans to join her as spies, even at the risk 5 if they were caught. In one of her most 6 Tubman helped Colonel James Montgomery plan a raid to free slaves from plantations along the Combahee River in South Carolina.
Early on the morning of June 1, 1863, three gunboats carrying several hundred male soldiers along with Harriet Tubman set out on 7 mission. Tubman had 8 so she knew where the soldiers were hiding along the shore. She also found out where they had placed 9 in the water.
As the early morning fog lifted on some of the South’s most important rice plantations, the Union expedition hit hard. The raiders set fire to buildings and destroyed bridges 10 they could not be used by the Confederate Army. They also freed about 750 slaves — men, women, children, and babies. 
Allen, who writes about this adventure and many others, got to know Tubman well through the months of research he did for the book. The historic 12 Tubman and many other important figures of her time, to life. To gather the facts, Allen searched libraries and the Internet, and even walked in Tubman’s footsteps. He went to the river just south of the area where the raid took place. Standing in the kind of country she would have known, 13 Allen began to understand the world that Tubman came from.
Allen says his most exciting moment came when a librarian led him to written accounts by people who actually saw Tubman and the raiders in action. Tubman 14 was born a slave, had a debilitating illness, and was unable to read or write, yet she was a tough woman who could take charge and lead men. 
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Which of the following is the LEAST acceptable alternative to the underlined portion?CorrectIncorrect
Given that all of the following are true, which one should be placed here to offer a logical explanation for the information in the rest of the paragraph?CorrectIncorrect
The writer is considering adding the following true sentence to the end of the preceding sentence (replacing the period after the word babies):
— and did not lose one soldier in the attack.
Would this be a relevant addition to the paragraph?CorrectIncorrect
Given that all of the following sentences are true, which one should the writer add here to help readers visualize the rural landscape in which Harriet Tubman spent most of her life?CorrectIncorrect
Assuming that all the choices are true, which one most effectively concludes the essay?CorrectIncorrect