Correct option is DGiven: x2−2x−63x2+14x+49\frac{x^2 -2x-63}{x^2+14x+49}x2+14x+49x2−2x−63 Formula Used: x2−y2=(x+y)(x−y)x^2 -y^2 = (x+y)(x-y)x2−y2=(x+y)(x−y)Solution: