Omg pls me

what was one result of the thirteenth, fourteenth, and fifteenth amendments?

a. african americans were forced to use racially segregated public facilities.
b. african americans gained enough political influence to dominate southern governments.
c. african americans lost their right to sue white americans in state and federal courts.
d. african americans were guaranteed political rights and equal protection under the law.

Why might the spanish government have approved of the encomienda system? a the system allowed for fair treatment of all under it, leading to a happy and prosperous colony. b the system used natives as slaves which meant the government was able to maximize their profit of exported goods. c the system allowed for mostly profitable trade within the different colonies. d the system was a great example of how to successfully run a colony, making spain a world power.