. . . "10 Aug 2007, 20:11 beckee529 wrote:vineetgupta wrote:I chose A initially...but I think 'as a result of' is redundant in this case.B is the best of all choices...but is not increased CO2 resulting...awkward...how could a past event be affected by a present progressive event...any thoughts??in the context of this sentence, 'increased' is used as an adverb to modify CO2 not as a verb." .