Refer to the Newsela article "Climate Change in Hawaii and U.S. Tropical Islands."
What is the author's purpose in mentioning the economies of the islands?
A: to explain that the cost of fish will be lower on islands
B: to suggest that islanders will look to other industries for develop income
C: to suggest that climate change will generate millions of dollars in tourism
D: to explain that climate change will affect tourism, a major source of income for islanders