Why Is Mating in Humans Always Effectively Random Even If

Multiple Choice

Why is mating in humans always effectively random even if individuals were to intentionally pick mates based on the absence of important genetic diseases?

A) Even if all the genetic loci are used in making a mate choice, the next generation randomizes the genes anyway.
B) In humans, there is no linkage, even between genes located near each other on the same chromosome.
C) The mating is still random across almost every one of the more than 22,000 loci across the human genome.
D) Humans lack genetic diversity; therefore, almost all human genes have a single allele.