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.

Example Input: In the forest, one type of tree produces special seeds. These seeds start to grow only after going through a fire. In the fire, the adult trees are destroyed. Which resources, needed for growth, are now available to the newly growing seeds?  
 (A) sunlight and wind (B) sunlight and space (C) soil and pollen producers (D) pollen producers and space
Example Output: B

Example Input: What is a main feature of plains?  
 (A) a flat, level surface (B) a high, steep peak (C) a low, shallow basin (D) a gentle, gradual slope
Example Output: A

Example Input: The construction of Hoover Dam on the Colorado River resulted in abundant freshwater and electrical power for the region. Which of these is a disadvantage of the construction of Hoover Dam?  
 (A) an increase in flooding downstream (B) an increase in regional humidity (C) a decrease in the amount of river ecosystems (D) a decrease in the amount of water for irrigation
Example Output:
C