Where predation pressure is high, we generally find group composition to be

a. one male harem

b. a monogamous pair

c. multimale/multifemale

d. solitary

The correct answer is option c. "multimale/multifemale".

Explanation:

One of the most common primate groups that could be found in nature are multimale/multifemale groups. This kind of primate grouping is seen more often when predation pressure is high. Only male or only females groups join forces to chase and attack predators more easily that diverse groups, therefore these groups are primate defense system against predators.