Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: And, of course, burning of gasoline produces toxic carbon monoxide. Given the two facts above, toxic carbon monoxide is produced by what?
Available choices:
A). gasoline engines
B). Electric generators
C). electric cars
D). electricity
E). solar panels
F). cigarettes
G). an engine
H). ionization
Answer:
A).