A Particle Initially at Rest Undergoes Rectilinear (I

Multiple Choice

A particle initially at rest undergoes rectilinear (i.e.,straight line) motion with an acceleration that is constant in magnitude and direction.The velocity of the particle

A) is constant in magnitude and direction.
B) is constant in direction only.
C) is constant in magnitude only.
D) can change in magnitude and direction.
E) is described by none of these.