The Diagram Shows the Electric Field Lines in a Region

Multiple Choice

The diagram shows the electric field lines in a region of space containing two small charged spheres (Y and Z) . Then:

A) Y is negative and Z is positive
B) the magnitude of the electric field is the same everywhere
C) the electric field is strongest midway between Y and Z
D) the electric field is not zero anywhere (except infinitely far from the spheres)
E) Y and Z must have the same sign