Answer:
C. Trial 2 with a moderate amount of water
Step-by-step explanation:
It's possible that it is a typo and the final number in trial 2's moderate amount of water study is supposed to be 6.4 and not .64, but if it is then I don't know what the answer would be. Test 2's lot of water test is much higher than test 1 and 3's but that was not given as an option so I'd say the answer would have to be answer C. Trial 2 with a moderate amount of water.
