During half an hour of kayaking, the writer found that______ 

• A. 
  he was more impressed by the view from the kayak than by that from the boat
• B. 
  the problem of pollution there was serious with plastic or other junk floating around.
• C. 
  he could see the peaks rise sharply in front of him
• D. 
  he could see a thin layer of oil on the water in a full circle around the main area