A curve with equation of the form y = ax4 + bx3 + cx + d has zero gradient at the point (0, 1) and also touches the x - axis at the point (- 1, 0) then the values of x for which the curve has a negative gradient are :
(A) x > - 1
(B) x < 1
(C) x < - 1
(D) - 1 ≤ x ≤ 1
