A sprinter had an average acceleration of -2. 5 m/s² over a 2-second period of a race. Her velocity could have changed from:
A. 9. 5 m/s to 7 m/s
B. 7 m/s to 9 m/s
C. 8. 5 m/s to 4 m/s
D. 4. 5 m/s to 8 m/s
E. None of the above