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:
Rocks that contain fragments of bones, shells, and plant remains are most likely  
 (A) crystals. (B) igneous. (C) sedimentary. (D) metamorphic.

Ex Output:
C


Ex Input:
What property is the same for each atom of an element?  
 (A) energy (B) mass number (C) atomic number (D) number of neutrons

Ex Output:
C


Ex Input:
A red flowered plant (RR) is crossed with a white flowered plant (WW) and produces plants with pink flowers (RW). If two pink flowered plants are crossed, what color offspring could be produced?  
 (A) red, white, and pink (B) red and white (C) pink and red (D) pink and white

Ex Output:

A