Imagine a Steel Pipe That Doesn't Leak from the Sides

Multiple Choice

Imagine a steel pipe that doesn't leak from the sides and is already filled with water. Water enters at a rate of 2 kg/s but leaves at a rate of 1 kg/s. Which of the following is true?

A) The water pressure inside the tube rises as water is added.
B) The tube is narrower where the water enters than where it leaves.
C) The water flow must be laminar.
D) It is not possible for this situation to occur.