The Fact That Humans Have a Relatively Large Number of Mutations

The fact that humans have a relatively large number of mutations per genome per generation when compared with other organisms can be explained by which of the following statements?

A) Humans are so complex because we have multiple proteins doing the same job.
B) Human cells don't divide as often as those of other organisms.
C) Most of a human's DNA is noncoding, so most of the mutations are neutral.
D) Most of these mutations happen after reproduction, so they wouldn't be selected against.
E) Humans have multiple proteins doing the same job, and our cells don't divide as often as other those of other organisms.