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:
Eyeglasses help a nearsighted person see as a result of  
 (A) absorption. (B) diffraction. (C) reflection. (D) refraction.

Ex Output:
D


Ex Input:
Martin is writing a report for science class about how the tilt of Earth affects living organisms. Which subject should Martin include in his report that is directly affected by Earth's tilt?  
 (A) night and day (B) cloud formation (C) phases of the Moon (D) changing of the seasons

Ex Output:
D


Ex Input:
Liquid cooking oil was poured into a container. Which statement best describes a property of the cooking oil after it was poured into the container?  
 (A) Its color changed. (B) Its mass increased. (C) Its volume stayed the same. (D) Its temperature quickly increased.

Ex Output:

C