Which of the Following Statements Regarding Species Diversity Is False

Multiple Choice

Which of the following statements regarding species diversity is false?

A) More than 99 percent of the species known to science are now extinct.
B) As much as 20 percent of the world's biodiversity will be lost during the next 50 years.
C) Through agriculture,humans have actually increased the number of plant species.
D) About 85 mammal species and 113 species of birds have become extinct in the last 400 years.