What causes coral bleaching?
A. High water temperatures and water acidity cause coral polyps to expel algae, causing them to turn white inn color.
B. High water temperatures boil polyps, causing them to turn white in color.
C. Water acidity and high water temperatures make coral polyps more prone to infection, causing them to turn white in color
D. Water acidity causes coral polyps to lose their photosynthetic abilities, causing them to turn white in color