Let's look at all the options:
A. they use the funds from the federal budget for personal gains
-no, they're not allowed to use it for personal gains
B. they make it more hard to decide who or what to vote for
-no, this is not desired: they should make the voting easier by presenting their opinions on issues
C. they assist in the decision-making process
-I think that this is the best answer. The decision here is the political decisions and administrative decisions in a country.
D. they divide and separate a lot of different people who ave similar views
-no, rather they unite people with similar views.