What term was used to describe the tough divide between free and slave states by the mid-1800s?

a. the lincoln-douglas line
b. the cotton curtain
c. the slavery line
d. the mason-dixon line

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.

What argument is susan b. anthony making in the passage? a. male citizens created the laws to secure the rights of men, so legal reform is required to secure women’s rights. b. women are often punished for committing criminal acts that are pardoned when committed by men. c. women are judged under laws supposedly written only for males, so they are entitled to the same rights as males. d. the court judge modified the original documents to arrest and try anthony unfairly.

All of the following cities are located in china except