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:
Which two life processes occur in both plants and humans?  
 (A) growing and reproducing (B) germinating and making food (C) growing and making food (D) germinating and reproducing

Ex Output:
A


Ex Input:
A student hypothesizes that algae are producers. Which question will best help the student determine if this is correct?  
 (A) Do algae consume other organisms? (B) Which organisms consume algae? (C) Do algae use sunlight to make food? (D) Could an ecosystem survive without algae?

Ex Output:
C


Ex Input:
Having students wash their hands frequently with soap and water will limit the spread of infectious disease by  
 (A) protecting harmless bacterial cells. (B) changing viral and bacterial nucleic acids. (C) releasing mutated cells from pores. (D) removing viruses and bacteria from the skin.

Ex Output:

D