If several specific traits exist in an individual, which situation would increase the number of genetically unique gametes produced?

Missing choices:

a. Many of the alleles are homozygous.

b. There are fewer chromosomes present.

c. Many of the alleles for the traits are on different chromosomes.

d. Most of the alleles for the traits are on the same chromosome.

My answer:

c. Many of the alleles for the traits are on different chromosomes.