An Electron Moving in The $+ y$ Direction, at Right Angles to a Magnetic Field, Experiences a Angles

Multiple Choice

An electron moving in the $+ y$ direction, at right angles to a magnetic field, experiences a magnetic force in the $- x$ direction. The direction of the magnetic field is in the

A) +y direction.
B) $+ z$ direction,
C) $+ x$ direction.
D) $- x$ direction.
E) $- z$ direction.