What is the difference between a permanent magnet and a temporary magnet?
A. permanent magnets always have their domains lined up and temporary magnets only have their domains lined up in the presence of an external magnetic field
B. temporary magnets always have their domains lined up and permanent magnets only have their domains lined up in the presence of an external magnetic field
C. permanent magnets have domains and temporary magnets do not
D. temporary magnets have domains and permanent magnets do not