What is a contribution made by Harriet Tubman? Why was her contribution so important to United States history?

1. Harriet Tubman is credited with conducting upward of 300 enslaved people along the Underground Railroad from the American South to Canada. She showed extraordinary courage, ingenuity, persistence, and iron discipline.

2. In addition to leading more than 300 enslaved people to freedom, Harriet Tubman helped ensure the final defeat of slavery in the United States by aiding the Union during the American Civil War. She served as a scout and a nurse, though she received little pay or recognition.

pretty sure it is c

explanation:

length of the cultivating season was not a problem of new england agriculture