A limit on specialinterest contributions to national politic

A limit on special-interest contributions to national political campaigns:?

Solution

Limiting special-interest contributions to national political campaigns would mean that there would be lesser amount of contributions given to the political campaigns. Investors usually contribute to the political campaigns as a way to rent seeking i.e. they use it as a way to increase their profits.

Now, if there is limit on how much one can contribute for the national political campaigns, there would be lesser and lesser extent on how much one can benefit by contributing to the national politicla campaigns. Thus, there would be reduced extent of the rent seeking.

Option D is the correct answer.