Which kind of group finds outside strategies to be most useful

The answer is the interest groups. It is because this is a group where in people are joined together because of the shared purpose that they all have and a way that they work together because of the fact of promoting their interest, influencing others and protecting their own. They will find outside strategies to be useful because their group are likely to take part in social and political systems.

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !