You are given a science question (hard-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]: Matt is a tall, eleven-year-old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?  
 (A) his height (B) his scar on his right cheek (C) his intelligence (D) his ability to play the drums
[EX A]: A

[EX Q]: A flowing stream contains water at 18°C. Cans of soft drinks at 28°C are lowered into the stream. Which of the following will most likely occur?  
 (A) The soft drink cans will absorb cold energy from the stream's water. (B) The cans will cool until their temperature is the same as the stream's. (C) The temperature of the soft drinks will not change since the cans are sealed. (D) The temperature of the cans will decrease to freezing as long as the stream is flowing.
[EX A]: B

[EX Q]: Coal is a natural material, formed from ancient organic compounds. Which element is least likely to be found in a sample of coal?   
 (A) carbon (B) hydrogen (C) silver (D) sulfur
[EX A]:
C