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: Which best describes a characteristic of the jet stream?  
 (A) It forms a boundary between a cold air mass and a warm air mass. (B) It creates the high winds around the eye of a hurricane. (C) It forces the hot air along the equator to rise to areas in North America. (D) It causes high pressure air masses to rotate clockwise.

Output: A


Input: Consider Input: One role of a producer in a food chain is to provide  
 (A) water for plants (B) sunlight for plants (C) nutrients for animals (D) shelter for animals

Output: C


Input: Consider Input: Pollen is necessary for a flowering plant to  
 (A) grow. (B) blossom. (C) germinate. (D) reproduce.


Output: D