The Magnitude of the Magnetic Field Due to the Presence

The magnitude of the magnetic field due to the presence of a charged body

A) varies directly with the speed of the body.
B) varies directly with the charge carried by the body.
C) varies inversely with the square of the distance between the charged body and the field point.
D) depends on the magnetic properties of the space between the charged body and the field point.
E) is described by all of these.