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'.

Input: Consider Input: Question: ___ are remains of the past life on Earth.  (A) Continents (B) Plates (C) Fossils (D) Pumic.

Output: C.


Input: Consider Input: Question: *** *** *** tree *** grass alike?  (A) Both make wood. (B) Both have roots. (C) Both need moonlight. (D) Both have short lives.

Output: B.


Input: Consider Input: Question: *** *** are consumers that live in a *** *** ecosystem that is alternately submerged and exposed by tides. This type of ecosystem contains poisonous *** and many species of ***. The sea star's advantage in this ecosystem is that it can  (A) pry open shells. (B) produce a tiny light. (C) move quickly along the sea bottom. (D) survive the pressurized atmosphere of deep water.


Output: D.