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]: A delta can be seen from the air at the mouth of the Mississippi River. This delta was formed by  
 (A) erosion. (B) weathering. (C) conservation of soil. (D) deposition of sediment.
[A]: D


[Q]: Why does the leaf of a plant look green?  
 (A) Because it absorbs green light (B) Because it reflects green light (C) Because it absorbs only yellow and blue light (D) Because it reflects a mixture of yellow and blue light
[A]: B


[Q]: What are the products in the chemical reaction below? NaOH + HCl -> NaCl + H_{2}O  
 (A) sodium hydroxide and hydrogen chloride (B) sodium chloride and water (C) sodium, chlorine, hydrogen, and oxygen (D) sodium, chlorine, and water
[A]:
B