An Electron Is Travelling in the Positive X Direction

Multiple Choice

An electron is travelling in the positive x direction. A uniform electric field is in the negative y direction. If a uniform magnetic field with the appropriate magnitude and direction also exists in the region, the total force on the electron will be zero. The appropriate direction for the magetic field is:

A) the positive y direction
B) the negative y direction
C) into the page
D) out of the page
E) the negative x direction