The correct answer is "I can't believe he has <em>swum </em>to the island." Swum is the past principle of "swim." However, if you drop the word <em>has </em>the answer would be D and the sentence would appear much more grammatically appealing. :)
Answer:
I think it is B
Explanation: Plz tell me if I'm wrong :P
Because it shows only what the narrator knows at any given point, it increases suspense and tension.
The second one uses active voice. the phrases “is going” “pulled” are examples of active voice.