Which one of the following functions is NOT continuous? Select one alternative: x2 - 3x - 4 of(x) = x- 4 5 C=4 x2 - 1 of(x) = x-1 2 c=1 x2 + 2x - 8 of(x) = x#2 x - 2 3 =2 x2 - 2x - 3 of(x) = x - 3 4 C = 3