设x2+px+q=(x-α)(x-b),若α<0,b<0则下列何者正确?

设x2+px+q=(x-α)(x-b),若α<0,b<0则下列何者正确?
(A)p>0，q<0(B)p<0，q<0
(C)p<0，q>0(D)p>0，q>0