A scientist is studying the impact of a new manufacturing plant on the local ocean ecosystem. How could she best monitor the impact of the manufacturing plant on populations in this ecosystem? A. She could perform several wildlife surveys over time to observe any changes in the number and type of marine organisms in the ecosystem. B. She could add a chemical to the water to react with the waste products that the manufacturing plant is dumping into the marine ecosystem. C. She could ask the manufacturing plant to treat all of the waste products that they are dumping into the marine ecosystem. D. She could collect data on the amount of product made by the manufacturing plant and how much the product sells for in local cities.