An Unusual Island Located in the Indian Ocean, off the coast of southeastern Africa, Madagascar is the world's fourth- largest island. Hosting an unusually large number of species in a relatively tiny area, 1 Madagascar's biodiversity is its exceptional feature. This unusual variety is made possible in part by the island's geographic features. Covering less than 0.5 percent of the world's landmass, the island contains rainforests, mountains, and plains. 2
The vast number of species found in Madagascar stems from the fact that it has been cut off from other landmasses for 80 million years. 3 As a result, the island has been an ideal setting for allopatric speciation, a process in which geographically isolated populations of the samespecies

A) NO CHANGE
B) biodiversity is Madagascar's most exceptional feature.
C) the exceptional feature of Madagascar is
D) Madagascar features exceptional biodiversity.

2 At this point, the author wants to add an additional statistic that supports the paragraph's main point about Madagascar's biodiversity. Which choice best accomplishes that goal?
A) Up to 90 percent of the island's plant and animal species cannot be found anywhere else in the world.
B) The temperature of the Indian Ocean around Madagascar has been rising at the rate of one degree Celsius per year.
C) Madagascar's climate makes it ideal for coffee production, and the island exports 25.5 million kilograms of coffee annually.
D) All of the world's lemur species are endemic to Madagascar, but 90% of them are forecasted to go extinct within the next 50 years.
3
A) NO CHANGE
B) On the other hand,
C) In spite of this,
D) At the same time,