Answer= D. Velocity includes a direction; speed does not.
Velocity and speed both have the same units of m/s, so answers A and B are wrong.
Velocity is a vector quantity and so has direction and magnitude, so C is wrong.
Speed is a scalar quantity, only having magnitude and no direction.
Answer:<em> I would stop been shy, so I could be able to say what I think to others. I would be nicer to others, behave better. I would share more with others.</em>