Tina owns a store that sells computers. Her profit, in dollars, is represented by the function P(x) =x3-20x2-96x, where x is the number of computers sold. Tina states that there are three possible values of x for which she will have a profit of $0. Find the values of x that produce a zero profit.

a x = 0

b x = -24

c x = 24

d x = 4

e x = -4