In Order to Overcome the Free-Rider Problem,non-Economic Groups Have

In order to overcome the free-rider problem,non-economic groups have

A) deliberately restricted the size of their membership.
B) joined up with economic groups.
C) convinced government to limit the distribution of public goods to those who have contributed to the group's efforts.
D) used Internet resources and computer-assisted mailing lists to target potential donors.
E) adopted taxes for nonmembers.