Coral Reefs Have Been One of the Ecosystems Most Seriously

Coral reefs have been one of the ecosystems most seriously affected by climate change.Spikes of high temperature and acidity have killed more than half of all corals in some reef systems, including the Caribbean.A process called coral bleaching leaves the corals without color, appearing white.Coral bleaching occurs because the

A) high acidity causes the coral skeleton to disintegrate.
B) high temperature and acidity cause corals' algal symbionts to be expelled.
C) corals' algal symbionts change color as temperature and acidity rise.
D) acid caused by excess CO₂ has a bleaching effect on corals.
E) increased water temperature has a bleaching effect on corals.