Question

the fifteenth amendment
a. was endorsed by president andrew johnson.
b. guaranteed that one could not be denied suffrage based on race.
c. was drafted by susan b. anthony.
d. made states responsible for determining all voter qualifications.
e. granted women the right to vote in federal but not state elections.

Explanation:

The Fifteenth Amendment to the U.S. Constitution, ratified in 1870, prohibits the denial of voting rights based on race, color, or previous condition of servitude. President Andrew Johnson opposed it; Susan B. Anthony focused on women's suffrage (addressed by the 19th Amendment); it restricted states from using race to set voter qualifications, and it did not grant women suffrage.

Answer:

b. guaranteed that one could not be denied suffrage based on race.