An Electron Is Accelerated from Rest by an Electric Field

An electron is accelerated from rest by an electric field. After the acceleration, the electron is injected into a uniform magnetic field of 1.27 × 10^-3 T. The velocity of the electron and the magnetic field lines are perpendicular to one another. The electron remains in the magnetic field for 5.00 × 10^-9 s. The angle between the electron velocity on entry and the electron velocity at exit from the magnetic field is

A) 1.1 rad.
B) 5.8 × 10^-2 rad.
C) 8.68 × 10^-2 rad.
D) 6.5 × 10^-2 rad.
E) 2.3 rad.