If a Recessive Allele Causes a Fatal Disease That Kills

Multiple Choice

If a recessive allele causes a fatal disease that kills the affected individual before he or she can reproduce,why doesn't that allele quickly become extinct in the population?

A) Alleles are never lost from a population.
B) The homozygous-dominant individuals protect the recessive allele in their genomes.
C) The recessive allele is carried in the genome of heterozygotes, who do not have the disease.
D) The homozygous-recessive individuals give their alleles to other individuals before they die from the disease.