If a permanent bar magnet is broken in half, which choice most accurately describes the properties of these two new halves?

Each half has both a north pole and a south pole. Magnetic poles cannot be isolated on two separate objects.

Both halves are entirely south poles. Magnetic poles can be isolated from each other.

One half is entirely a north pole. The other half is entirely a south pole. Magnetic poles can be isolated from each other.

Both halves are entirely north poles. Magnetic poles can be isolated from each other.