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 first telescopes were invented hundreds of years ago. Which was discovered as a result of this invention?  
 (A) the moons of Jupiter (B) the bacteria that causes disease (C) the deep-sea trenches in the ocean (D) the parts of a plant that perform photosynthesis

Ex Output:
A


Ex Input:
The molecule ATP is composed of elements commonly found in organic molecules. Which of the following is one of these elements?  
 (A) aluminum (B) calcium (C) phosphorus (D) tin

Ex Output:
C


Ex Input:
What do producers need to make food?  
 (A) sunlight, oxygen, and carbon dioxide (B) sunlight, water, and carbon dioxide (C) water, oxygen, and carbon dioxide (D) water, oxygen, and sunlight

Ex Output:

B