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: *** effect *** *** *** *** ****** *** predators *** *** *** ***  (A) They increase the mutations in a population. (B) They prevent a population from becoming extinct. (C) They increase the rate of population growth. (D) They can limit the growth of the population.
E.

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.
E.

Question: A *** *** shows how energy moves from one living thing to another. The *** always *** with ___.  (A) a plant or plant part (B) the smallest animal (C) the animal that was eaten last (D) the largest anima.

E.