Sally takes two bar magnets and randomly tapes one end of each bar magnet. she labels the magnets a and b. she brings the taped ends of two magnets together and they attract each other. sally knows that opposite poles of magnets attract. she then brings the taped end of a third magnet (magnet c) near each of the first two magnets. predict her observations.

Since the two taped poles of the magnets labeled A and B attracts one to each other, we know that the two taped poles are oppsosite.

So, you can predict with total certainty that when she brings the taped end of the third magnet (magnet C) near each of the first two magntes, in one case they will attract each other and in the other case they will repele mutually.

You are certain of that because, since the taped poles of the first two magnets are opposite, the pole of the third magnet has to be equal to one of the two first taped poles and opposite to the other of the two firest taped poles.

A. to determine if humans can explore mars safely