A Charged Particle Moves with a Constant Speed Through a Region

Multiple Choice

A charged particle moves with a constant speed through a region where a uniform magnetic field is present.If the magnetic field points straight upward,the magnetic force acting on this particle will be strongest when the particle moves

A) straight upward.
B) straight downward.
C) in a plane parallel to Earth's surface.
D) upward at an angle of 45° above the horizontal.