Carbon Offsetting Initiatives Intend to Raise Donations in Order to Balance

Carbon offsetting initiatives intend to raise donations in order to balance emissions used with emissions saved. Where do these donations typically go towards?

A) Funding a specific carbon-saving project, like a wind farm
B) Funding the general activities of an environmental organization, like Green Peace
C) Funding the campaign expenses of the Green Party
D) Funding large corporate ventures to create more environmental sustainability products (e.g. the Toyota Prius)