instruction:
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.
question:
A chameleon can change colors to match its surroundings. This ability helps the chameleon survive because it can  
 (A) stay warm. (B) find a mate. (C) hunt for food. (D) be easily seen.
answer:
C


question:
Tanya investigates which household objects are attracted to magnets. Which will help her make a conclusion?  
 (A) a prediction (B) a hypothesis (C) a list of supplies (D) a table of results
answer:
D


question:
Coal is usually found underground, compressed in a layer between other types of rock. Coal is produced by what rock-forming process?  
 (A) crystallization from melted rock (B) formation of sediment from weathering (C) deposition and burial of dead plant matter (D) eruption of volcanic ash followed by settling in a layer
answer:

C