If $\alpha,\:\beta$ are roots of the equation $x^2+x+1=0$ then the equation whose roots are $\alpha^{19}\:\:and\:\:\beta^7$ is ?

Question

$\begin{array}{1 1}(A)x^2-x+1=0 \\ (B) x^2+x+1=0 \\ (C) x^2-x-1=0 \\(D) x^2-x-1=0 \end{array}$