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 Q]: Which of these would help to prevent infections from occurring in small cuts and scrapes?  
 (A) apply a cold ice pack (B) raise the injured area (C) apply pressure to stop bleeding (D) wash the area with warm, soapy water
[EX A]: D

[EX Q]: The floating arrow on a compass always points towards the  
 (A) west. (B) east. (C) south. (D) north.
[EX A]: D

[EX Q]: A student crumples up a sheet of paper. Which property of the paper has changed?  
 (A) color (B) mass (C) state (D) shape
[EX A]:
D