Humans differ from each other by 1 in 1000 to 1 in 5000 nucleotides,while chimpanzees differ from each other by 1 in 500 nucleotides.This suggests that _____.

A) humans are a younger species
B) humans are an older species
C) humans descended directly from chimpanzees
D) chimpanzees descended directly from humans
E) chimpanzees and humans have identical proteomes