Which problem presents the most challenges for native amercans on reservations today?
a. economic opportunity is limited.
b. native americans are not allowed to move off reservations.
c. residents of reservations lack u. s. citizenship.
d. no schools are present on reservation grounds.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.

the 9th amendment

explanation: