Which Statement Is True

Multiple Choice

Which statement is true?

A) Biologists have discovered almost all of the species that inhabit Earth.
B) Biologists have discovered about three-quarters of the species that inhabit Earth.
C) Biologists have discovered about half of the species that inhabit Earth.
D) Biologists have discovered only a small percentage of the species that inhabit Earth.
E) Biologists have discovered a small percentage of the species that inhabit Mars.