Differentiate.

$y=\frac{8x-5}{8x^{2}7}$

A$.\frac{dy}{dx}=\frac{-64x^{2}24x91}{(8x^{2}7{)}^2}$

B$.\frac{dy}{dx}=\frac{192x^2-80x56}{(8x^{2}7{)}^2}$

c$.\frac{dy}{dx}=\frac{-64x^{2}80x56}{(8x^{2}7{)}^2}$

D$.\frac{dy}{dx}=\frac{64x^3-128x^{2}136x}{(8x^{2}7{)}^2}$