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]: People are developing electric cars that would replace gasoline-burning cars. One major advantage of the electric car is that it
(A) accelerates faster. (B) causes less pollution. (C) gives a smoother ride. (D) needs no battery.
[A]: B

[Q]: Which is an example of a chemical reaction?
(A) Vinegar added to baking soda forms a gas. (B) Water evaporates into air. (C) Sugar dissolves in water. (D) Corn kernels are crushed to form flour.
[A]: A

[Q]: What is an example of a force producing heat?
(A) an apple falling from a tree branch (B) doorbell ringing when a switch is pushed (C) a wagon rolling across a yard when pulled (D) two sticks getting warm when rubbed together
[A]:
D