The Force Between Two Bar Magnets Cannot Be Due to Gravity

The force between two bar magnets cannot be due to gravity, because

A) the force between magnets is far too large to be caused by gravity.
B) the force between magnets can be repulsive, while gravity must be attractive.
C) Both of the above.
D) the force of gravity is always downward, unlike the magnetic force.
E) All of the above.