Answer:The first option
Explanation:Although im not exactly sure this is right, it is what i would go with
The first one is the correct answer..no commas needed
in that paragraph, the expression Mounting evidence could be a bit confusing, but it indicates that there's been reaserch about it before, and that it all points in the same direction, the more research proving the same point means the data is convincing. The answer is D.
