What Are the Specific Environmental Consequences of a Phytoplankton Bloom

Multiple Choice

What are the specific environmental consequences of a phytoplankton bloom?

A) An increase in phytoplankton acidifies ocean water.
B) Phytoplankton are decomposed by aerobic bacteria, which depletes the surrounding water of oxygen.
C) Phytoplankton fix nitrogen in the water causing nitrification.
D) Phytoplankton are decomposed by anaerobic bacteria which enriches the surrounding water with oxygen.
E) Phytoplankton use up hydrogen ions, which decreases the acidity of the surrounding water.