Answer:
C. The court was no longer beholden to Congress for room.
Explanation:
As we know, the US government has three branches: Judicial branch, Executive Branch and Legislative Branch. Each of them is independent and has its powers.
Initially, the US Supreme Court did not have a permanent location, until 1810 it had residents in the Capitol. As the Senate expanded the Court lost space.
The current building of the US Supreme Court began to be built in 1932 and ended in 1935. It is very important to the Judicial branch to have its building, as a sign of independence of other branches of the government.