A waterway borders a farm that commercially produces corn and soybeans. Over time, algae in the waterway begins to grow and forms an algal bloom. what is the most likely cause for this algal bloom?
A) Runoff of gasoline from tractors and plows used at the farm
B) Runoff of nitrates from fertilizers applied to the farm
C) Runoff of animal waste from pets raised at the farm
D) Runoff of topsoil from the farm