A Uniform Electric Field Is Present in the Region

Multiple Choice

A uniform electric field is present in the region between the infinite parallel planes of charge A and B, and a uniform electric field is present in the region between the infinite parallel planes of charge B and C. When the planes are vertical and the fields are both non-zero,

A)
and
are both directed to the right.
B)
and
are both directed to the left.
C)
points to the right and
to the left.
D)
points to the left and
to the right.
E) Any one of the above is possible.