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.

Ex Input:
The Sun is classified as  
 (A) an organism (B) a decomposer (C) a star (D) a planet

Ex Output:
C


Ex Input:
One hot summer, a grassland experienced a drought. Which most likely happened in the ecosystem during this time?  
 (A) The competition for food among primary consumers increased. (B) Nutrients cycled through the system at a faster rate. (C) Less solar radiation was able to enter the system. (D) Secondary consumers became extinct.

Ex Output:
A


Ex Input:
Tiny droplets of water seen floating in the air can give scientists a clue about the weather. What are groups of these droplets called?  
 (A) hail (B) rain (C) a front (D) a cloud

Ex Output:

D