The pedigree below shows two generations of individuals within a family. The pedigree shows that a daughter has a genetic condition, that neither her parents nor siblings have. What is the most likely reason the daughter has this condition?
A. The condition is one that is not inherited.
B. Both parents' chromosomes contain genes that carry the recessive trait.
C. One parent must have genes that carry a dominant allele for the condition.
D. Her genes carry dominant and recessive alleles inherited by the parents.