Which of the Following Statements Is NOT True About Biodiversity

Which of the following statements is NOT true about biodiversity?

A) The really important species of animals and plants are those that we rely on for food; if we can protect them we can avoid any harmful effects even if other species go extinct.
B) The size of tropical rain forests have been reduced from 14% to 6%.
C) Exotic species play a role in 50% of extinctions.
D) Coral reefs may become extinct in the next forty years.
E) Overexploitation by human activities can lead to a loss of biodiversity.