PT 14 S2 Q19

A report on the likely effects of current levels of airpollution on forest ... ...

Which one of the following most accurately expresses the main point of the passage?
(A) The implication of the report cited is that the amount of nitrogen reaching eastern forests by way of polluted air is approximately what those forests need for optimal growth.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Main Point: Intro Set