Dramatic irony occurs when the audience knows something that the characters don’t.
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.
It shows delightful humor and delightful scenes of fun times. This book is his memoir about his life.
Mass failures in public examinations: a natural disaster (Im not sure if this is the answer you were looking for but hopefully it helps :) )
