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.

[EX Q]: Shale is a sedimentary rock that can be metamorphosed into slate by  
 (A) cementation. (B) chemical weathering. (C) sedimentation. (D) increased pressure.
[EX A]: D

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

[EX Q]: Sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl), which is commonly known as  
 (A) soap. (B) vinegar. (C) table salt. (D) baking soda.
[EX A]:
C