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.

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

The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water
C

Which basic units of matter have the same properties as an element?  
 (A) protons (B) electrons (C) atoms (D) neutrons

C