Simple phenomena of magnetism — practice question

Which statement correctly describes the direction of a magnetic field at a point?

• AIt is the direction of the force on an N pole placed at that point.
• BIt is the direction of the force on an S pole placed at that point.
• CIt is the direction of the force on a positive charge placed at that point.
• DIt is the direction of the force on a negative charge placed at that point.