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'.

Q: Question: Tobias *** his *** on a road for a *** *** ***. On average, he *** a *** *** *** *** *** *** during this ***. Which of the following was his *** *** for this *** *** ***?  (A) 10 km/hr (B) 15 km/hr (C) 20 km/hr (D) 25 km/h.

A: E.
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Q: Question: A female *** is having puppies. She has *** fur, *** ***, and a *** ***. She *** sit, bark, and *** over on command. Which set of *** *** the female dog's *** ***?  (A) brown eyes, black fur (B) fur, roll over on command (C) brown eyes, sit on command (D) bark on command, curly tai.

A: E.
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Q: Question: A group of fifth grade students go to the *** *** on a *** *** and *** the *** of their *** at *** ***, at ***, and at *** ***. To *** and *** the *** from their ***, they *** a ***.  (A) thermometer and balance (B) clock and measuring tape (C) clock and calculator (D) clock and thermomete.

A:
E.
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