Which part of the judicial system best completes the bubble labels (3) in the diagram?

The correct answer is B, as U.S. District Courts are under the U.S. Courts of Appeals in the judicial diagram of the United States.

Explanation:

United States District Courts are the first-instance courts of the federal judicial system in general law.

There are 94 courts that adjudicate civil and criminal litigation under common and statute law.

There is at least one court per state and up to four for California, Texas and New York; there is also one in the District of Columbia. For unincorporated territories, there are one for Puerto Rico, the US Virgin Islands, Guam and the Northern Mariana Islands respectively.