What Strategies Allow Cooperative Individuals to Flourish in a Group

Multiple Choice

What strategies allow cooperative individuals to flourish in a group and overcome the negative impact of free-riders?

A) there must be a mental structure that allows people to recognize and categorize people as free-riders
B) when free-riders are identified, cooperators need to use strategies to punish them or create incentives to foster their cooperation
C) cooperators learn to "turn the other cheek," accept the free-riders, and share resources with them
D) both (a) and (b)