The answer is D. It provided a source of transportation for goods and people
Answer:
Harriet Tubman is perhaps the most well-known of all the Underground Railroad's “conductors.” During a ten-year span, she made 19 trips into the South and escorted over 300 slaves to freedom. And, as she once proudly pointed out to Frederick Douglass, in all of her journeys she “never lost a single passenger.” Harriet Tubman, too, believed that all men and women are born free. Hence, it was worth the risk each time she made a trip to the South to gather slaves.
Explanation:
Chris Hani Baragwanath Hospital
Because they didn't have phones or computers back then to type on or call people so they had to write everything down
