Deposits of Coal Are Important in the Carbon Cycle Because

Deposits of coal are important in the carbon cycle because they

A) Keep humans from burning more trees by serving as fuel source.
B) Serve as a reservoir of carbon that will eventually be released into the ecosystem.
C) Lock up carbon so that it can never be returned to the atmosphere to make global warming increase.
D) Make carbon readily available to plants through their roots growing down into the coal deposit.
E) Serve as short term storage for carbons.