A car is initially traveling at an unknown velocity. It accelerates constantly
for 5.0 seconds of elapsed time at a rate of 3.0 m/s² to reach a velocity of
30 m/s. What was the initial velocity of the car?
(A) 1.0 m/s
(B) 5.0 m/s
(C) 10 m/s
(D) 15 m/s