What was the effect of the 15th amendment?
a. it legalized the “separate but equal” doctrine.
b. it gave black men the right to vote.
c. it struck down the jim crow laws in the south.
d. it made former slaves citizens of the united states.

Me! why was marbury v. madison such an important case? a. it confirmed that the supreme court was more powerful than congress but less powerful than the president b. it confirmed the authority of the supreme court to review a law in to determine whether or not that law is constitutional. c. it confirmed the authority of congress to increase or decrease the power of the supreme court. d. it gave the supreme court the power to confirm federal judges.