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 are examples of inherited traits?  
 (A) specific beliefs (B) fingerprints (C) memories (D) nose shape

Ex Output:
D


Ex Input:
Which difference between water and ice results in ice floating on cold water?  
 (A) heat (B) shape (C) density (D) volume

Ex Output:
C


Ex Input:
Which mineral is most likely to be found in all of the three major rock types known as metamorphic, igneous, and sedimentary?  
 (A) halite (B) quartz (C) gypsum (D) sulfur

Ex Output:

B