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]: Solids, liquids, and gases are all different states of which of the following?  
 (A) mass (B) matter (C) weight (D) volume
[A]: B


[Q]: Which is most likely a genetic adaptation of desert plants to survive the hot, dry climate conditions?  
 (A) thin bark (B) waxy leaves (C) leaves that remain all year (D) flowers that bloom all year
[A]: B


[Q]: A calculation based on the chemical energy of gasoline shows that a car should be able to go 100 miles on a gallon of fuel. When the car was driven on a test track, the car only went 25 miles on a gallon of fuel. What accounts for most of the difference?  
 (A) the mass of the driver and the fuel carried by the car (B) the wind resistance between the car and the air nearby (C) the waste heat from the combustion of fuel in the engine (D) the friction between the tires and the surface of the track
[A]:
C