What were frederick douglass and harriet tubman known for?

1.) fighting to improve conditions for prisoners and the mentally ill.

2.) speaking out against slavery and slaves escape via the underground rail road.

3.) championing the cause of immigrants in northern cities.

4.) pushing for improved conditions for millions women in the factories.

Correct  2) Speaking out against slavery and helping slaves escape via the Underground Railroad.

Details:

When Frederick Douglass was a slave in Maryland, he taught himself to read and write. Then he undertook to teach other slaves those skills.  That got him sent to a slave master who was known for his harsh treatment of slaves, at the age of 16.   In 1838, when he was about 20, he managed to escape from slavery and went to New York City.  He then married a free black woman from Baltimore, and they settled in Massachusetts.  He became a prominent and powerful spokesman of the abolitionist movement, seeking to end slavery in the United States.

Harriet Tubman was also 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.

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation:

answer: a tolerated diverse population

explanation: the city of baghdad formed to vast semi- circles on the right and left banks of the tigris twelve miles in a diameter.