why is it important for gametes to be haploid?

A ) they fuse to form diploid organism so that there is the expected number of chromosomes
B ) it is impossible for them to be diploid because reproduction does not result diploidy
C ) when gametes are made, the diploid cell splits twice, creating four haploid organisms.
D ) neither parent has the full set of genetic information so each must contribute to their half.

D) neither parent has the full set of genetic information so each must contribute their half.