Mike Wants to Know How Many Licks It Takes to Get

Multiple Choice

Mike wants to know how many licks it takes to get to the centre of his lollipop.He tells his friends that "one full gyration of the tongue around the outer surface of the lollipop" is what constitutes a "lick." In an informal way,Mike is offering a(n) :

A) measurement instrument to answer his question.
B) way to eliminate the reactivity sometimes associated with observation.
C) operational definition for the behaviour he wants to measure.
D) naturalistic observation.