In a Circular Loop of Wire Lying on a Horizontal

In a circular loop of wire lying on a horizontal floor,the current is constant and,to a person looking downward,has a clockwise direction.The accompanying magnetic field at the center of the circle is directed

A) horizontally and to the east.
B) horizontally and to the north.
C) vertically upward.
D) parallel to the floor.
E) vertically downward.