Which of the following scenarios would erroneously lead you to believe two genes reside on different chromosomes when they in fact are on the same chromosome?

A)the genes are very far apart on the same chromosome,such that there is always a crossover between them
B)the genes are very close together on the chromosome,such that there is never a crossover between them
C)too large a sample size
D)the genes are very far apart on the same chromosome,such that there is never a crossover between them
E)a mating between consanguineous individuals