The Velocity of a Particle (M = 10 Mg,q = $\mu$

Multiple Choice

The velocity of a particle (m = 10 mg,q = -4.0 $\mu$ C) at t = 0 is 20 m/s in the positive x direction.If the particle moves in a uniform electric field of 20 N/C in the positive x direction,what is the particle's speed at t = 5.0 s?

A) 60 m/s
B) 20 m/s
C) 45 m/s
D) 40 m/s
E) 70 m/s