Answer:
O A. Males only have one X chromosome.
Step-by-step explanation:
Males are XY and Females are XX. Based on this fact, option A is true. Option B is false b/c women can carry recessive alleles, option c is incorrect b/c males can carry dominant alleles, option D is incorrect b/c females have two X chromosomes.
From process of elimination, A is the best choice. Hope you get it right