When is the force experienced by a current-carrying conductor placed in a magnetic field the largest?

• A
  When the current flows parallel to the magnetic field.
• B
  When the current flows at an angle of $45^{\circ}$ to the magnetic field.
• C
  When the current flows perpendicular to the magnetic field.
• D
  When the current flows at an angle of $30^{\circ}$ to the magnetic field.