Answer: D
Step-by-step explanation:
The cause-and-effect relationship in the provided options is best exemplified by:
D. Because resident Kjell Ove Hveding helped start a campaign to bring more tourists to Sommarøy, the island experienced a huge increase in visitors.
In this case, the cause is Kjell Ove Hveding's campaign to attract more tourists, and the effect is the significant increase in visitors to the island of Sommarøy.