Answer:
C: It will take a while, but long before it becomes a solid mass of mud Lake Powell ("Jewel of the Colorado") will enjoy a passing fame as the biggest sewage lagoon in the American Southwest.
Step-by-step explanation:
The clearest example of pathos from "The Dam-nation of a Canyon" is shown in the excerpt C. The writer uses some statements and phrases such as: "become a mass of mud" and "fame as the biggest sewage laggon" that evoke some feeling of urgency about the lagoon that has been neglected. The function of pathos is to persuade appealing to emotions.