"The Isokinetic Resistance Mechanism Used in Most Rehabilitative Exercise Equipment

"The isokinetic resistance mechanism used in most rehabilitative exercise equipment works on centripetal force, similar to the way the Gravitron carnival ride does-the faster the motor or the patient moves, the faster the resistance mechanism spins, and the more resistance is created." What method of explanation is employed in this example?

A) elucidating
B) quasi-scientific
C) transformative
D) demonstrative