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

A．research into tropical-forest biology on Barco Colorado Island
B．how the whole ecosystems can depend on the survival of a single species
C．the life cycle Of the fig wasp
D．the importance of forests to the human race

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 research.