Help tell me what to write

9. States limited the voting rights of people of color and women through the use of poll taxes, literacy tests, threats, intimidation, fear, and violence.
10. The 15th, 19th, and 26th amendments were all passed to increase the voting rights of Americans. The 15th amendment gave African American men the right to vote. The 19th amendment gave all American women the right to vote. The 26th amendment gave people the age of 18 the right to vote.

The answers is most likely b since during a war the other options are just nice to have. but b is needed.