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: Plants transform energy when they make their own food. Which type of energy is used by plants for making food?  (A) electrical (B) heat (C) light (D) mechanica?

SOLUTION: C.

PROBLEM: Question: Living things need which of the following to survive?  (A) food and electricity (B) air, food, and shelter (C) water, food, and clothes (D) food, water, and ai?

SOLUTION: D.

PROBLEM: Question: A student spills a cup of water onto a table. What property of the water has changed?  (A) chemical composition (B) volume (C) color (D) mas?

SOLUTION:
B.

