Ecological Factors, Such as Resource Quality and Distribution and the Availability

Ecological factors, such as resource quality and distribution and the availability of receptive mates, may influence the mating patterns displayed even within a single species. For example, black howler monkeys (Alouatta pigra) , found to be primarily polygynous in a deciduous forest habitat, when studied in a riparian habitat which is much more lush, were found to be

A) monogamous.
B) polyandrous.
C) polygynandrous.
D) polygynous.