John Orbell and His Colleagues (1988)gave Each Participant $6 and Told

John Orbell and his colleagues (1988) gave each participant $6 and told them that they could keep the $6 or else donate it to the group.If they donated,the $6 would be doubled and then divided among all members of the group.Orbell et al.(1988) found that when participants were allowed to discuss the situation among themselves,they were more likely to pool their money and make a large profit,in essence doubling their original $6 to $12.Why does this approach not work well for entire communities caught in such social dilemmas?

A) It will only work well when people are given the money at the outset.
B) It will only work well when it is possible to punish those who choose not to cooperate.
C) It will only work well when the resource in question is monetary.
D) It will only work well when people can discuss the situation face-to-face.
E) It will only work well when people trust one another.