TASK DEFINITION: In this subtask, you will answer a simple science question. Please indicate the correct answer. If you're not sure about the answer, choose the last option "I don't know". Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. The "A"-"D" responses correspond to the answer options mentioned in the input. There is a 5th option "E" which should be used for questions for which you're not sure about the answer (e.g., when the questions do not provide enough information to answer).
PROBLEM: Question: Yesterday it rained. Today it is snowing. The temperature today is most likely  (A) higher than yesterday (B) lower than yesterday (C) the same as yesterday (D)?

SOLUTION: B.

PROBLEM: Question: Which of these most likely has the GREATEST mass?  (A) Chicken (B) Puppy (C) Lizard (D) Hors?

SOLUTION: D.

PROBLEM: Question: A student found a rock while hiking in the mountains. By looking at the rock, she could tell the  (A) exact weight of the rock. (B) length of time the rock had been on the hiking path. (C) color and shape of the rock. (D) exact length of the rock?

SOLUTION:
C.