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Candice learns that all magnets have two magnetic poles. Which of the following observations would best support this statement?

A.) The north pole of a compass needle is attracted to the south pole of a bar magnet.

B.) When a bar magnet is cut in half, each half has a north pole and a south pole.

C.) The strength of a horseshoe magnet's magnetic field decreases as the magnet is pulled away from another object.

D.) When an electric current flows through a wire, a magnetic field forms around the wire.

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Greenleafable
The correct answer is B. When a bar magnet is cut in half, each half has a north pole and a south pole. 
So, Candice learned that every magnet has two magnetic poles. This means that when you cut a whole magnet into two parts, you will get two new magnets. According to her observation, each of these two new magnets are going to have a north pole and a south pole.

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