In an iron triangle, the interest group a. is legally excluded from any interactions with congressional committees and administrative agencies. b. files formal lawsuits and amicus briefs against administrative agencies and congressional incumbents. c. provides campaign contributions to members of Congress and lobbies for larger administrative agency budgets. d. organizes grassroots mobilizations against administrative agencies and congressional incumbents.

The correct answer is C. provides campaign contributions to members of Congress and lobbies for larger administrative agency budgets.

Explanation:

In an IRON TRIANGLE, the interest group provides campaign contributions to members of Congress and lobbies for larger administrative agency budgets.

The Iron Triangle refers to the relationship between interest groups, Congressional committees and the bureaucracy and the relationship between this three may appear unbreakable.

AN INTEREST GROUP is an organization that pushes a certain political policy or policy idea (agenda), usually with a focus on a certain controversial topic and they rely on public support.

The impacts of the interest group is to donate money to political campaigns as influence, educate the public on certain issues, conduct research on their issues and gain public support through recruitment.