The Graph Below Shows Position as a Function of Time

Multiple Choice

The graph below shows position as a function of time for a swimmer competing in a 100-m race swimming twice the length of a 50.0 m pool) . Which of the following statements regarding the motion is incorrect?

A) The average speed of the swimmer is 1.90 m/s.
B) The average velocity of the swimmer is 1.90 m/s,
C) The average velocity of the swimmer is 0.0 m/s
D) When swimming the second part of the 100-m race, the swimmer is moving with negative velocity.
E) Swimmer's average acceleration during the second part of the 100-m race is negative.