Kirk wants to know if someone his height will go faster on a bike with a larger frame. What should he do next in order to follow the steps of the inquiry?
A. Predict the effect of bike size on the speed of a rider his height.
B. Design an experiment in which people his height ride bikes of various sizes.
C. Observe riders his height riding bikes of various sizes.
D. Time himself riding around a track on bikes belonging to several of his friends.
