François Jacob and Jacques Monod Discovered ________

François Jacob and Jacques Monod discovered ________.

A) a mechanism for how proteins regulate gene activity
B) the degree of genetic similarity between humans and chimpanzees
C) the Hox cluster of homeotic genes
D) evolutionary changes in the timing and rate of developmental processes
E) the parallel between the order of regulatory genes on a chromosome and the location in the embryo where these genes are expressed