Policies That Benefit Special Interest Groups Are Often Adopted by Governments

Policies that benefit special interest groups are often adopted by governments because

A) these groups in the aggregate tend to represent a broad social consensus.
B) such groups are more efficient in the allocation of resources than government bureaucracies; hence, support of their programs raises economic efficiency.
C) doing so equates marginal social benefits with marginal social costs.
D) such groups contribute more to government revenues than they receive in the form of public benefits.
E) the gains of these relatively small groups come at the expense of a large number of people, each of whom loses very little and so is less aware of the loss.