What did poll taxes and literacy tests virtually wipe out?

a. the gains african americans had won from the thirteenth amendment.
b. the losses african americans had sustained from the fourteenth amendment.
c. the gains african americans had won from the fifteenth amendment.
d. the losses african americans had sustained from the civil rights act of 1875.

Neeed now for 1. eye color is a polygenic trait. what is the possibility of getting a green (aabb) eyed child, if parent 1 has brown eyes (aabb) parent 2 has blue eyes (aabb) 2.albinism is a recessive trait. having normal pigment is the dominant trait. what is the possibility of having an albino child if parent 1 is heterozygous normal parent 2 is heterozygous normal 3.in rabbits black fur is dominant over white fur. what is the probability of getting a rabbit with black fur if parent 1 is heterozygous black parent 2 is homozygous white