Question

Let the function f(x) = 2x³(2p - 7)x² 3(2p - 9)x - 6 have a maximum for some value of x < 0 and a minimum for some value of x > 0. Then, the set of all values of p is
A) {7/2, 9/2}
B) {-7/2, 9/2}
C) {7/2, -9/2}
D) {-7/2, -9/2}