Parallel Plates: Two Large, Flat, Horizontally Oriented Plates Are Parallel

Multiple Choice

Parallel plates: Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Half way between the two plates the electric field has magnitude E. If the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

A) 4E
B) 2E
C) E
D) 0
E) E/2