I believe the answer is ; private organization
interest group usually funded by private organization who would be benefited if a certain legislation is passed. In order this, interest groups usually help to collect a huge number of financial aid for a government representative's campaign with hope that the representative would reciprocate and help the organization in the future.
b. depression
c.personality disorders
d. anxiety disorders
Here is the answer and explanation
B. north
C. south
D. west