Car A starts from rest and accelerates uniformly for a period ... ...

  Car A starts from rest and accelerates uniformly for a period of time t to travel a distance d. Car B, which has four times the mass of car A, starts from rest and accelerates uniformly as well. If the magnitudes of the forces accelerating A and B are the same, how long does is take B to travel the same distance d?
(A) 16t
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 03. Laws of Motion