(a) P(exactly one major hurricane will strike the mainland)= | (Round to three decimal places as needed.) (b) P(at most one major hurricane will strike the mainland)= | (Round to three decimal places as needed.) (c) P(more than one major hurricane will strike the mainland) (Round to three decimal places as needed.) Which of the events are unusual? Select all that apply. A. The event in part (a) is unusual. B. The event in part (b) is unusual. C. The event in part (c) is unusual. D. None of the events are unusual.