[单选题]
04.08: The diagram shows a uniformly accelerating ball. The positix, lwtn7wa5a+;vfox -tc:8v onrl0j) on of thfc .fiwqrbb 88,*f7qme ball each second is indicatedq bc87.w fr8,i*bm qff.
What is the average speed of the ball between 3 and 4 seconds?
A. 3.0 cm/s
B. 3.5 cm/s
C. 4.0 cm/s
D. 7.0 cm/s
E. 12.5 cm/s