Available options: a. Burning gasoline; b. Burning wood; c. Electrical energy; d. a hydraulic system; e. Driving a boat; f. Burning tires; g. Time and energy; h. hydrogen and oxygen;
Given those answer options, answer the question: Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: Gasoline is used in cars, boats, motorcycles, lawn mowers and other engines. Given the two facts above, what does using a car require?
A:
a.