One of the proposed solutions to global warming is to grow a large number of trees. This could be effective because:

A) trees would move carbon from CO₂ in the atmosphere to organic molecules.
B) the gross primary production of trees moves CO₂ into soil.
C) plant carbon is different from atmospheric carbon.
D) when decomposed, plant carbon is impossible to convert back to CO₂.
E) plants are the base of all ecological food chains.