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.

[Q]: Which traits would a species of nocturnal predators most likely develop over time to survive in the wild?  
 (A) a small size (B) flat, grinding teeth (C) sharp vision and hearing (D) resistance to weather changes
[A]: C


[Q]: When gasoline in a car engine is burned, only about 15 percent of the gasoline is converted into mechanical energy. This is because most of the energy in the gasoline is  
 (A) transformed into heat. (B) stored for use at a later time. (C) changed into chemical energy. (D) used to make the vehicle move.
[A]: A


[Q]: Kerry made a simple flashlight. She recorded the following statements in her lab book. Which statement is an inference?  
 (A) The wire was 35 cm long. (B) The flashlight contained a battery. (C) The plastic switch was better than the metal switch. (D) The bulb was lit for 20 minutes before it burned out.
[A]:
C