A bicyclist, initially at rest, begins to pedal in a straight line, accelerating at 3 m/s². Which of the following best describes her motion?
A) The bicyclist travels 3 m each second.
B) The bicyclist travels 3 m/s each second.
C) The bicyclist travels 3 m/s² each second.
D) The bicyclist's speed increases by 3 m each second.
E) The bicyclist's speed increases by 3 m/s each second.
F) The bicyclist's speed increases by 3 m/s² each second.
G) The bicyclist's acceleration increases 3 m each second.
H) The bicyclist's acceleration increases 3 m/s each second.
I) The bicyclist's acceleration increases 3 m/s² each second.