Most probably the reason was based on to gain the favor of their bills. They need to have the votes on their bill and because of this, they have to explain it to other members of Congress. They have to be diligent enough to have a popular vote and enact their bill.
Answer:
The House Committee on Un-American Activities, popularly dubbed the House Un-American Activities Committee, and from 1969 onwards known as the House Committee on Internal Security, was an investigative committee of the United States House of Representatives
Explanation:
I believe that is known as Gerrymandering.
C)
It's when you manipulate boundaries to favor a certain party.
I dont have an answer to this it would take to long to write, sorry.