What is the main idea of the passage?

• A. Henderson Island, though untouched by humans, has become the most polluted places on earth.
• B. Henderson Island is today looking ugly with the amount of trash dumped there because of human settlements
• C. The trash on the island is harming marine life since fishes eat the colorful plastic pieces mistaking them for food.
• D. The waste is turning out to be alarmingly dangerous to the ecology.