Studies of Gene Mutation Frequencies Have Shown That __________

Studies of gene mutation frequencies have shown that __________.

A) mutations are rare, and genomes are generally stable
B) mutation frequencies differ among organisms and also between genes, suggesting certain genes are more susceptible to mutation
C) mutation frequencies are consistent between organisms, and each region of DNA is equally susceptible to random mutations
D) Both A and B are correct
E) Both A and C are correct