An open-air waste water treatment plant is flooded by rain. The rainwater and the waste run into a nearby creek. The organic wastes are very high in Biological Oxidation Demand (BOD) which means the bacteria in the waste need a lot of oxygen. What is the best hypothesis to explain why many fish might die as a result of this event?

f The bacteria create toxic wastes.
g The bacteria are eaten by the fish and are toxic.
h The bacteria remove the oxygen from the water.
j The bacteria eat all the food in the creek.