Adrian is measuring the time it takes to heat 200 mL of water until it boils. He is doing the experiment for the third time. He predicts that it will take six minutes for the water to start to boil. This is a good prediction if
A.
he heats twice as much water for the third test.

B.
recess begins in six minutes.

C.
it took nine minutes for his neighbor's water to boil.

D.
it took six minutes for the water to boil the first two times.