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: The changing appearances of the nighttime sky over the surface of Earth and eclipses of the Moon have provided evidence that  
 (A) Earth is a sphere. (B) Earth supports life. (C) Earth has a layered atmosphere. (D) Earth is covered mostly with water.

Output: A


Input: Consider Input: Which of these senses lets Dora know when a skunk has been close to her house?  
 (A) Taste (B) Touch (C) Smell (D) Hearing

Output: C


Input: Consider Input: In 1989, an oil spill off the coast of Alaska led to a decline in the population of many organisms. Which other population was most likely affected by the drop in population of the fish, otters, and seals?  
 (A) deer (B) eagles (C) frogs (D) snakes


Output: B