Two students hang a magnet just above a paper clip. Which action would make the magnetic force between the magnet and the
paper clip stronger?
A. Add electrons to the magnet.
B. Move the magnet farther away from the paper clip.
C. Add protons to the paper clip.
D. Move the magnet closer to the paper clip.
the

Ibelieve that the correct answer is: c. along plate boundaries

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current