The lines of force due to an isolated magnet are directed A) away from the North pole and towards the South pole. B) away from the North pole and away from a South pole. C) toward the North pole and away from the South pole. D) towards the North pole and towards the South pole

A current is induced in a closed, conducting loop if A) the magnetic field through the loop changes. B) the loop changes in area or angle. C) the loop moves into or out of a magnetic field D) All of the above.