Consider the criticisms of interest groups. Which of the following would address one of the criticisms of interest groups?
a. a requirement that members must contribute financially to the group
b. limiting their sphere of influence to the State level
c. a law establishing a limit on the amount of money that groups can spend each year
d. a law preventing them from providing information to government officials
Proposing "c. A law establishing a limit on the amount of money that groups can spend each year" would address one of the criticisms of interest groups, since groups with more money to spend tend to be "heard" more.