Two Planes of Charge with No Thickness,A and B,are Parallel

Two planes of charge with no thickness,A and B,are parallel and vertical.The electric field in the region between the two planes has magnitude
) The electric field in the region to the left of A and the electric field in the region to the right of B may have the magnitudes

A) 0,0.
B) , .
C) , .
D) given in any answer above.
E) given only in answer (a) or (b) above.