Scientists Have Described Most of the Species Living on Earth

Scientists have described most of the species living on Earth. True or False?

A) False. There are about 50 billion, and they haven't nearly all been found.
B) True. There are about 1.3 million.
C) False. There are 30 million described, but there may be about 50 million out there.
D) True. There are about 30 million described.
E) False. There are about 1.3 million described but there may be 30 million living now.