Answer:
B. increased health issues for people, such as allergic reactions
Step-by-step explanation:
When an algal blooming occurs what happens is that in a body of water some algae starts to reproduce largely and starts to little by little decreasing the life on that given body of water, the oxygen, light and nutrients available for the living creatures starts to decrease and the corpses of those animals and plants start to decompose and create a great environment for bacteria and algae to reproduce, creating a toxic environment in that body of water and it wouldn´t be drinkable or extremely toxic to human consumption.