Find All Critical Points of F(x) = 2x³y -4x³

Multiple Choice

Find all critical points of f(x) = 2x³y -4x³ + 6y³ -18y + 19.

A) (0, 1) , (0, - 1) , and (-9, 2)
B) only (-3, 2)
C) only (3, 2)
D) (0, 1) , (0, -1) , and (-3, 2)
E) only (0, 1) and (-3, 2)