instruction:
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.
question:
Which of the following is the best observation of the refraction of light?  
 (A) Looking at oneself in a mirror (B) Looking at a shadow of an object (C) Viewing an object through an open window (D) Viewing an object partially in water
answer:
D


question:
In which of these organs does most absorption of nutrients take place?  
 (A) liver (B) stomach (C) small intestine (D) large intestine
answer:
C


question:
Which elements are found to the right of the zigzag line in the periodic table?  
 (A) liquids (B) metals (C) metals and gases (D) nonmetals and gases
answer:

D