instruction:
In this task, you need to answer basic science questions. For each question, several terms are intentionally masked with ***. This masking can cover very few or many of the question words. Clearly, if masked terms are important, the modified question will be impossible to answer. Please indicate the correct answer with one of the following responses: "A", "B", "C", "D" or "E". While "A"-"D" correspond to the answer options provided in the input, "E" represents "I don't know" for questions that do not provide enough information. Respond via "E" if the question is not answerable. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'.
question:
Question: *** containers can be *** and made into new ***. How will *** *** most likely *** ***?  (A) People will use less energy. (B) People will drink more soda. (C) People will add less to landfills. (D) People will buy more things in cans.
answer:
C.


question:
Question: A girl signals her friend by shining a *** on a mirror. Her friend can *** the *** because  (A) heat energy can be transferred from one object to another (B) mechanical energy can be transferred from one object to another (C) sound energy can be reflected from one object to another (D) light energy can be reflected from one object to anothe.
answer:
D.


question:
Question: *** *** *** following *** *** example *** *** chemical change?  (A) clouds forming (B) sugar dissolving (C) water freezing (D) a candle burnin.
answer:

D.