What part of the flag contains the stars?

The correct answer is C, the Union, because it refers to the section of the flag where the stars are located. In the context of the United States flag, the Union is the blue rectangle in the upper left corner that contains the stars representing each state in the union. This part of the flag symbolizes unity and the federal nature of the country, with each star symbolizing a state.

The Fly refers to the portion of the flag that is farthest from the flagpole, which typically contains the stripes but not the stars. The Hoist is the side of the flag that is attached to the flagpole or halyard and does not contain any stars either. The Field refers to the background of the flag, which can include both stripes and the Union, but it does not specifically denote the area where the stars are located. Hence, the Union is the accurate term for the part of the flag that contains the stars.