What Is the Likely Fate of a Fish Living in a Eutrophic

What is the likely fate of a fish living in a eutrophic stream?

A) Fish will first thrive as they have more oxygen from the increase in photosynthetic organisms; eutrophic streams are low in nutrients however, so they will quickly die.
B) Eutrophic streams have high levels of carbon dioxide. Fish will be able to use this for aerobic respiration, so will thrive in this environment.
C) Eutrophic streams are always anoxic. This means that only anaerobic fish will be able to survive in a eutrophic environment.
D) Fish will first thrive as they have more food from the increase in photosynthetic organisms; as they deplete the dissolved oxygen, however, they will die. 
E) Eutrophic streams have low levels of nutrients in them. Only fish that feed off other fish will be able to survive in these streams.