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.

Sam looks into a fish pond and points at a goldfish. Sam's grandfather looks where Sam is pointing and tells Sam that the fish is actually in a different location. Which property of light explains why Sam's grandfather is correct?  
 (A) reflection (B) refraction (C) diffraction (D) absorption
B

The basic life functions of an organism are carried on by  
 (A) cells (B) nutrients (C) atoms (D) hormones
A

Humans need food to grow and survive. Food that is not used immediately by the body for energy is  
 (A) stored for future use (B) converted to water for energy (C) used to remove wastes from cells (D) transformed into oxygen for survival

A