Which of the following must occur for two populations of the
same species of monkey to evolve intotwo different species of
monkey?

A. Individuals must move between the two populations.

B. Individuals must prefer different characteristics in mates in
the two populations.

C. Different alleles must spread through each population.

D. One population must be better at surviving in its environment
than the other population.

E. Individuals in one of the populations must stop
reproducing.