As the waves crashed on the beach.
I think C is the correct answer, he is a 'skilled risk taker' most of the time. He was fooled only once, in that incident with the frog, but otherwise he always wins everything he competes in.
Typically unnamed characters are representative of universal characters. They symbolize anyone who might find himself in such a difficult situation.
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I think its "Whose" because 'Who's" is shortened for "Who is"