There are three situations all have the same probability p. They are #1: both event E and event F accur, #2: event E occurs and event F does not occur; and #3: event E does not occur and event F does occur. What is the probability that either event E or F occurs?

A) 1p

B) 2p

C) 3p

D) 3p^2

E) 2p^3

F) p^1/2

G) All of the above

H) None of the above