What is the main purpose of interest groups?
A. To influence the news media
B. To influence public policy
C. To expand constitution rights
D. To support political parties
( I believe it is B)
An interest group is a collection of people who distribute general purposes and plan to change the management. They are attempting to convince the government.
The fundamental purpose of interest groups is to shape public policy. Interest groups do this by collecting a large group of people that have an opinion on a particular subject to get the consideration of a political organization to fix or design a policy to go with their requirements.