Once a stimulus has been determined to function as a reinforcer in a particular contingency, which of the following is likely to be true?
A . The reinforcer should be adjusted to vary during the observation period.
B . The reinforcer should be used with others in the immediate environment.
C . The effect of the reinforcer may strengthen with relevant deprivation.
D . The effect of the reinforcer will weaken if a variable interval schedule is used.
Answer: C