Which expression equals x/x² - 2x - 3 . 2x - 6 / x²- 4x + 3 ?
(A) 2x - 1 / (x-1)(x+3)(x+1)
(B) 2x+1 / (x-1)(x+1)(x-3)
(C) 2x / (x-1)(x+1)(x-3)
(D) 2x / (x+3)(x-1)(x+1)