The Cooperative Breeding System of Primates Such as Marmosets and Tamarins

Multiple Choice

The cooperative breeding system of primates such as marmosets and tamarins can be explained by

A) chimerism, which increases fraternal twins' inclusive fitness when they help raise one another's offspring.
B) helpers who care for the offspring of the breeding pair, although the helpers are usually not related to them.
C) the fact that mothers sometimes allow their daughters to breed.
D) mutualism between the nonbreeding helpers.