According to the text, what is the estimated number of species in coral reefs?

The estimated number of species in coral reefs is around 93,000 based on the species/area relationship.
The number of species in coral reefs could be as high as 4.7 million if there are 20 million species in tropical forests.
The Panglao project has discovered hundreds of new species in coral reefs.
The taxonomists estimate that the number of species of diatoms is between 2 and 1,000 times greater than the currently recognized number.
a) Only afirmation I is correct.
b) Afirmations I and II are correct.
c) Afirmations II and III are correct.
d) Afirmations III and IV are correct.
e) Afirmations I, II, and IV are correct.