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: While conducting an experiment on gravity, what will be needed to ensure the safety of students?  
 (A) quiet zones (B) drop zones (C) heavy objects (D) frictionless surfaces
Example Output: B

Example Input: After playing outside on a cold day, Jaime went inside to wash his hands. Although the water was normal temperature, he noticed that it felt warmer than usual. What would explain this phenomenon?  
 (A) His body had more kinetic energy than the water. (B) Heat flowed from a cooler substance to a warmer substance. (C) The water from the faucet had a higher temperature than his skin. (D) The thermal energy in the room was higher than the thermal energy outside.
Example Output: C

Example Input: Feathers, wings, and the hollow bones of birds are examples of  
 (A) adaptations for flight (B) responses to stimuli (C) unnecessary body parts (D) reproductive structures
Example Output:
A