The Reason the North Pole of a Bar Magnet Free

Multiple Choice

The reason the north pole of a bar magnet free to rotate points north is because:

A) the south geographic pole of the Earth is the Earth's magnetic north pole.
B) the south geographic pole of the Earth is the Earth's magnetic south pole.
C) there is a net accumulation of negative magnetic charge at the Earth's south geographic pole.
D) there is a net accumulation of positive magnetic charge at the Earth's north geographic pole.
E) the north geographic pole of the Earth is the Earth's magnetic north pole.