Silas holds a magnet a few centimeters from a pile of metal staples. he knows that there must be a magnetic force on the staples, but it is not strong enough to move them. how could silas increase the magnetic force on the staples? choose 2 answers: choose 2 answers: (choice a) a use a weaker magnet. (choice b) b use a stronger magnet. (choice c) c move the magnet farther away from the staples. (choice d) d move the magnet closer to the staples.