In order to insulate the courts from POPULAR PASSIONS, the founders ensure that federal judges are APPOINTED FOR LIFE. The principal objective of the life tenure given to federal judges is to insulate them external pressures. The life term provides job security for them and enable them to do what is right under the law, since they do not have to fear that their position will be terminated if they make unpopular decisions.
The answer might be B. People who needed help could receive it. Having a democratic government is “for the people” which the government cares about what the people want and think.