The interior angle bisector of angle A for the triangle ABC whose coordinates of the vertices are A(–8, 5); B(–15, –19) and C(1, –7) has the equation ax + 2y + c = 0, then (a, c) =

(A) (10, 77)
(B) (11, 78)
(C) (12, 78)
(D) (9, 67)