Which of the following best describes the contribution of harriet tubman to the underground railroad?
a. tubman was a newspaper publisher who denounced the fugitive slave act.
b. tubman was a minister who housed escaped enslaved people in her home.
c. tubman was an antislavery leader who used force against proslavery groups.
d. tubman was a conductor who enslaved people escape.

 d. Tubman was a conductor who helped enslaved people escape.

More complete details:

Harriet Tubman was  an escaped slave. who had been held in slavery in Maryland.  She escaped to Philadelphia in 1849 ... but then went back to rescue her family and help them to freedom.  Then she helped extended family members, and eventually was helping many, many slaves to freedom on what became known as the "Underground Railroad" -- a secret network of routes from one safe house to another that aided slaves in their escape.

b. 155 enlisted men and no officers