In the Section "Investigating Life: Did a Myosin Gene Mutation

In the section "Investigating Life: Did a Myosin Gene Mutation Make Humans Brainier?",what does the high level similarity between the myosin gene sequences in human and non-human primates suggest?

A) Humans and non-human primates had a common ancestor at some time in the past.
B) Humans and non-human primates had common ancestor 2.4 million years ago.
C) The myosin gene arose independently in humans and non-human primates.
D) Genes can transfer readily between humans and non-human primates.
E) No natural selection has occurred in humans.