Two Planes of Charge with No Thickness, a and B

Multiple Choice

Two planes of charge with no thickness, A and B, are parallel and vertical. The electric field in region I to the left of plane A has magnitude and points to the left. The electric field in the region to the right of B has magnitude and points to the right. The electric field in the region between the two planes has magnitude and points to the right. The surface charge density on planes A and B respectively is

A)
, σ.
B)
, σ.
C) σ,
.
D) σ,
.
E) 2σ, σ.