According to the social brain hypothesis, each of us can deal effectively with social interactions with roughly 150 people. This implies that:__________.

a. most of us are able to maintain close, lifelong friendships with about 150 people.

b. we are capable of maintaining social networks of up to 150 people throughout our lives.

c. most of us cannot recognize more than 150 people at any given time in our lives.

d. we function best in groups of roughly 150 people, whether all are friends or strangers.