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:
How do plants get water and minerals?  
 (A) absorbed from the soil though the roots (B) absorbed from the soil through the stem (C) absorbed from the air through the flowers (D) absorbed from the air through the leaves

Ex Output:
A


Ex Input:
All of the planets in the solar system formed at about the same time from a large cloud of gas and dust. How is Earth different from other planets in the solar system?  
 (A) Earth has no natural satellites. (B) Earth's atmosphere is composed of gases. (C) Water is found in all three phases on Earth. (D) Volcanoes release liquid rock onto Earth's surface.

Ex Output:
C


Ex Input:
In the Adirondack forests of New York, some trees have died. The change in the forest is thought to be related to air pollution and rain. Which abiotic factor most likely has been changed as a result of the pollution and rain which resulted in the death of the trees?  
 (A) a decrease in the amount of available oxygen (B) an increase in the amount of sunlight (C) a decrease in the pH of the soil (D) an increase in soil nutrients

Ex Output:

C