16. The author focuses primarily on _______
(A) giving a brief overview of some recent scientific developments in solar physics and explaining their possible implications for future research.
(B) outlining the specific reasons why a long standing problem in solar physics is thought to be soluble at last.
(C) presenting two competing scientific theories for the cause of post-industrial climate change and evaluating the body of evidence behind each one.
(D) pointing out the success of a certain line of scientific inquiry into the terrestrial effects of solar activity while qualifying its successes with regard to climate change.