$\alpha,\beta$ are roots of $ax^2+bx+c=0$.The value of $(a\alpha+b)^{-2}+(a\beta+b)^{-2}$ is

Question

$\begin{array}{1 1}(A)\;\large\frac{b^2-2ac}{a^2c^2}&(B)\;\large\frac{c^2-2ab}{a^2b^2}\\(C)\;\large\frac{a^2-2bc}{b^2c^2}&(D)\;\text{None}\end{array}$