x2 +4, X - 4 X- - 4+ X-> - 4 a. Compute the limit of lim f(x) or state that it does not exist. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. X- -4 O A. lim f(x) = - 1 (Simplify your answer.) X- -4 O B. The limit does not exist