Answer the following question: Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: Gasoline ignites easily and burns vigorously. Given the two facts above, what ignites easily?

OPTIONS:
(a). rockets.
(b). fuel.
(c). air.
(d). cigars.
(e). Fuel cells.
(f). heat energy.
(g). oil.
(h). gasoline.
Answer:
(h).