If α, β, γ are roots of x3 – 3x2 + 3x + 7 = 0 and ω is a complex cube roots of unity, then \(\frac{\alpha -1}{\beta - 1} + \frac{\beta -1}{\gamma - 1} + \frac{\gamma-1}{\alpha-1}\) is equal to
(a) \(\omega\)
(b) \(2\omega\)
(c) \(2\omega^2\)
(d) \(3\omega^2\)
