If bx + cy = a, where a, b, c are of the same sign, let a line be such that the area enclosed by the line and the axes of reference is 1/8 square units, then:

(A) b, a, c are in G.P.
(B) b, 2a, c are in G.P.
(C) b, a/2, c are in A.P.
(D) b, -2a, c are in G.P.