Indicate the appropriateness of the subject for a research paper by choosing appropriate or not appropriate. if the subject is not appropriate, select the reason why. if the subject is appropriate, select "appropriate, no reason needed." my experiences at deep-sea fishing in san diego, california. reason:

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit