One Concern with Global Sea Temperatures Increasing Is the "Bleaching

One concern with global sea temperatures increasing is the "bleaching" of corals.What did the scientists propose happens to coral when it bleaches?

A) The coral dies
B) The coral loses its ability to perform photosynthesis
C) The coral becomes dormant until the water temperatures drop again
D) The coral releases its symbiotic photosynthetic algae
E) The photosynthetic algae in the coral grow more rapidly