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]: Diamonds are sometimes used as the tips of drill bits. Which physical property of a diamond MOST likely makes it a good cutting tool?  
 (A) its electrical properties (B) its thermal properties (C) its hardness (D) its density
[A]: C


[Q]: Which is a trait that a child can inherit from its parents?  
 (A) eye color (B) a broken leg (C) length of hair (D) language skills
[A]: A


[Q]: Which information will best help scientists determine if an object is a comet, an asteroid, or a meteoroid?  
 (A) the object's diameter (B) the object's composition (C) the shape of the object's orbit (D) the speed at which the object travels
[A]:
B