how do fossil fuels play a role in the carbon cycle?
A: Fossil fuels require a lot of carbon to burn, which releases carbon into the atmosphere.
B: Fossil fuels are rich in carbon, and burning them returns carbon to the soil.
C: Fossil fuels are rich in carbon, and burning them releases carbon into the atmosphere.
D: Fossil fuels require a lot of carbon to burn, which takes carbon out of the atmosphere.