The South Pole of a Bar Magnet Is Moved Toward

Multiple Choice

The south pole of a bar magnet is moved toward an aluminum ring, along the axis of the ring. As the magnet approaches, the changing magnetic flux induces an electric current in the ring that, when seen from the bar magnet, corresponds to positive charge carriers flowing

A) clockwise.
B) counterclockwise.
C) alternating with a fixed frequency.
D) alternating with a frequency proportional to a speed of the bar magnet.