In Which of the Following Situations Is the Magnitude of the Electric

In which of the following situations is the magnitude of the electric field the strongest.

A) a point 1 m from a 1-C point charge
B) a point 1 m along a perpendicular line from the center of a 1-m rod with a charge of 1-C
C) a point 1 m along a perpendicular line from the center of a 1-m diameter disk of charge 1 C
D) a point 1 m from the end of a 1m rod with a charge of 1 C along a line running longitudinal with the rod
E) All of the choices have the same electric field.