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.

Q: Which of these shows the correct order for the central dogma of molecular biology?  
 (A) DNA to protein to RNA (B) RNA to DNA to protein (C) protein to DNA to RNA (D) DNA to RNA to protein

A: D
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Q: 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

A: D
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Q: In the past, Native American Indians buried dead fish along with corn seeds. This technique was used because the decomposing dead fish would  
 (A) provide nutrients for the growing corn plant (B) eliminate the need for weeding around the corn plant (C) release oxygen for use by the corn plant (D) supply all the water needed by the corn plant

A:
A
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