C-03-Q066mediumsingle_mcqx2−x−6=?x^2 - x - 6 = ?x2−x−6=?a(x−3)(x+2)(x-3)(x+2)(x−3)(x+2)b(x+3)(x−2)(x+3)(x-2)(x+3)(x−2)c(x−6)(x+1)(x-6)(x+1)(x−6)(x+1)d(x−2)(x−3)(x-2)(x-3)(x−2)(x−3)