Final answer:
If you could triple the breakaway magnetic force during an experiment with all other factors remaining constant, the magnetic field would strengthen.
Step-by-step explanation:
If you could triple the breakaway magnetic force during an experiment with all other factors remaining constant, the likely effect would be (b) the magnetic field would strengthen. This is because the breakaway magnetic force is directly proportional to the magnetic field strength. If you triple the force, the magnetic field strength will also triple.