Which One of the Following Statements Best Describes the Equipotential

Which one of the following statements best describes the equipotential surfaces surrounding a point charge?

A) The equipotential surfaces are planes extending radially outward from the charge.
B) The equipotential surfaces are curved planes surrounding the charge, but only one passes through the charge.
C) The equipotential surfaces are concentric cubes with the charge at the center.
D) The equipotential surfaces are concentric spheres with the charge at the center.
E) The equipotential surfaces are concentric cylinders with the charge on the axis at the center.