A Low Coefficient of Coincidence Indicates That

A low coefficient of coincidence indicates that:

A) far fewer double-crossover recombinant progeny were recovered from a testcross than would be expected from the map distances of the genes involved.
B) crossing over has been enhanced for genes that are located near the centromere of chromosomes because there is less interference of one crossover on the occurrence of a second crossover event.
C) single-crossover recombinant classes in the progeny have been increased because the genes involved produce lethal phenotypes when in parental gene combinations.
D) there is a large map distance between one of the outside genes in the heterozygous parent and the middle gene, while there is a short map distance between the middle gene and the other outside gene.
E) the physical distance between two genes is very short compared with the genetic map distance between these two genes.