An electric current in a solenoid creates a uniform magnetic field inside the solenoid. The field points due east. Which modifications would make the magnetic field stronger and reverse its direction to due west?
- AUse a smaller current and turn the solenoid through $180^{\circ}$.
- BUse a smaller current and reverse the current.
- CUse a larger current and turn the solenoid through $90^{\circ}$.
- DUse a larger current and reverse the current.