The author's attitude to the ecological situation of the tropical forests is ______.

A．Charles Williams had tried to prevent his son from the killing
B．Charles Andrew kept his scheme to shoot as a top secret
C．people who had the clue of the killing did not take Andrew's words seriously except two
D．some of Andrew's classmates found a revolver in his backpack

A．Forests could not function without the fig wasp.
B．Forest will recover no matter what we do to them.
C．If man does not acquire an understanding of his relationship to the forest and other habitats there will be an ecological disaster.
D．Scientists' long-term contribution to the quality of life depends on their fig wasp researc