You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Input: Consider Input: All of the following can become fossils except  
 (A) bones. (B) shells. (C) teeth. (D) rocks.

Output: D


Input: Consider Input: Water at 20°C in an uncovered pan is evaporating very slowly. What could be done to the water to make it evaporate more quickly?  
 (A) Cover it. (B) Heat it. (C) Place it in the dark. (D) Put salt in it.

Output: B


Input: Consider Input: The Hubble Space Telescope is a telescope that NASA launched into space in 1990. Scientists most likely prefer to use the Hubble Space Telescope instead of a land-based telescope because it provides better accuracy at   
 (A) predicting solar eclipses. (B) investigating faraway galaxies. (C) investigating the size of Venus. (D) predicting the phases of the Moon.


Output: B