Suppose you have two magnets. magnet a doesn't have its poles labeled, but magnet b does have a clearly labeled north and south pole. if these two are brought into contact with one another, which of the following could you expect?

a. the side of magnet a that's attracted to magnet b's north pole must be magnet a's north pole.
b. the side of magnet a that's repelled by magnet b's south pole must be magnet a's north pole.
c. the side of magnet a that's attracted to magnet b's south pole must be magnet a's north pole.
d. the side of magnet a that's repelled by magnet b's north pole must be magnet a's south pole