Fact 1: Burning fossil fuels increases the carbon in the atmosphere. Fact 2: Oil is one type of fossil fuel. Given the two facts above, burning what substances increases carbon in the atmosphere?

Available options:
[A]. CO2
[B]. oil
[C]. tar
[D]. gas
[E]. CFCs
[F]. Cars
[G]. coal
[H]. peat
Answer:
[B].