The 15th amendment to the u. s. constitution, ratified in 1870, deals with what issue? a. prohibition of alcohol b. voting c. declaring war d. free speech

b voting

source https://www.law.cornell.edu/constitution/amendmentxv

15th Amendment

Amendment XV

Section 1.

The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude.

Section 2.

The Congress shall have power to enforce this article by appropriate legislation.