if current through a wire is traveling up, and a magnetic field is traveling to

The direction of the magnetic field is perpendicular to the wire and is in the direction the fingers of your right hand would curl if you wrapped them around the wire with your thumb in the direction of the current

Explanation:

This means when you change the direction of the current, you also change the direction of the magnetic field. ... Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet by bending away from the wire.

The correct answer is

B. crystallization of molten material inside Earth

just took the test and got it right :)