A Boat Is Traveling at 4

Multiple Choice

A boat is traveling at 4.0 m/s as it passes the starting line of a race. If the boat accelerates at 1.0 m/s² for 6.0 seconds, in the same direction as the velocity, then the magnitude of the average velocity of the boat during the 6.0 seconds is

A) 21 m/s.
B) 9.0 m/s.
C) 13 m/s.
D) 10 m/s.
E) 7.0 m/s.