Students know that young salmon in their area need streams with cold, clear water. The students heard that the trees in a forest above their town will be logged next year.
How could students test if the logging operation harms the health of their ecosystem?
O A. They can collect garbage along the stream banks and test the stream for pollution
OB. They can do an internet search for the effects of logging on the health of ecosystems.
O c. They can compare measurements of water temperature and cloudiness before and after the logging operation.
OD. They can make a questionnaire and ask people in their town if logging will be healthy or harmful for the ecosystem.