Critical Reasoning

Guys, i personally feel the answer to be D.. coz real fight is between A ad D..
rest all are either out of scope or against environmentalist.
A, i find true as per both the environmentalist and the geologist..
But D on the other hand, is true as per environmentalist but not true as per the geologist coz geologist says that we should stop GW to reduce the shrinking but D says that the GW is reduced and arctic doesn't shrink..
So, D should be the correct choice..As per the other forum(from which this question is) most of the users agree with D,I couldn't find the OA yet but will go with D..
thanks for the discussion though..

I would go with option D as the correct option