The Number of Differences Between Human Cytochrome C and Cytochrome

The number of differences between human cytochrome c and cytochrome c of some other organisms is as follows: Rhesus monkey - 1 difference; Pigeon - 12 differences; Fruit fly - 24 differences.The order in which these species are most similar to humans is:

A) Rhesus monkey, pigeon, fruit fly
B) Pigeon, Rhesus monkey, fruit fly
C) Pigeon, fruit fly, Rhesus monkey
D) Rhesus monkey, fruit fly, pigeon
E) Fruit fly, pigeon, Rhesus monkey