Driver a Is Cruising Along Enjoying the Fall Colors

Multiple Choice

Driver A is cruising along enjoying the fall colors. Driver B starts her car at the instant he passes her. Their velocities are shown as functions of time in the graph below. At what instants in time on the graph are drivers A and B side by side?

A) 0 s, 2 s
B) 0 s, 4 s
C) 2 s, 4 s
D) 2 s, 6 s
E) 4 s, 6 s