The height of a rider on a Ferris wheel changes periodically as the wheel turns. The length of one complete cycle of this periodic movement corresponds to one full rotation of the Ferris wheel.
In this context, the reasonable length of a cycle would typically be measured in time rather than distance or speed. A Ferris wheel completes a full cycle of height when it returns to the same position after one full rotation.
Among the options given:
A. 100 ft - This measures distance. B. 10 mph - This measures speed. C. 1 second - This is a time measurement, though quite short for a Ferris wheel rotation. D. 1 minute - This is also a time measurement and is more reasonable for a Ferris wheel cycle.
In this case, both options C and D refer to time, but D (1 minute) is often more typical for Ferris wheels in practical scenarios, depending on the specific speed of the Ferris wheel. Therefore, the most reasonable answer would be:
D. 1 minute