Water is leaking out of a container. At 2:30 p.m., there are 42 pints of water in the container. At 4 p.m., there are 30 pints of water in the container.
If the water continues leaking out of the container at the same rate, how much water will be in the container at 6:30 p.m.?
A. 26 pints
B. 50 pints
C. 25 pints
D. 10 pints