Select the correct answer.
Which data-gathering activity would be useful for a biomechanical analysis?
A.
creating a graph that compares the salaries of professional gymnasts
B.
comparing the numbers of female gold medalists and male gold medalists in gymnastics
C.
tracking the increase in the number of gymnastics programs in a city over the course of a decade
D.
measuring the angle at which a gymnast’s body bends during an aerial flip