Which of the following explains the relationship between alleles and natural selection?\
A. Alleles control an organism's genotype. Natural selection works directly on the genotype.
B. Alleles control an organism's genotype. Natural selection works directly on the phenotype.
C. Alleles control an organism's phenotype. Natural selection works directly on the genotype.
D. Alleles control an organism's phenotype. Natural selection works directly on the phenotype.
