Consider the quadratic equation ax2 + (2 - a)x - 2 = 0 where a ∈ R.
If α, β are roots of the quadratic equation and if there are at least four negative integers between α and β, then the complete set of values of a is
(A) (-7/2, -3)
(B) (0, 1/2)
(C) (-3/2, -1/2)