Final answer:
In the Moreton Bay situation, stakeholders would voluntarily reduce sewage discharge, scientists would develop methods to combat eutrophication, and laws regulating sewage discharge would be enacted. The best choice will be combination of options A, B, and C.
Step-by-step explanation:
In the Moreton Bay situation, we might expect the response to be a combination of options A, B, and C. Stakeholders would likely voluntarily reduce sewage discharge into the ocean to address eutrophication. Scientists would develop methods to combat the effects of eutrophication, such as implementing nutrient reduction strategies. Additionally, laws regulating sewage discharge would be enacted to enforce sewage discharge limits and chemistry regulations. This multi-faceted approach would aim to improve ocean health in Moreton Bay.