Professor Crane Was Ecstatic When He Learned That His Research

Multiple Choice

Professor Crane was ecstatic when he learned that his research study had been approved for publication.His feelings of joy quickly disappeared,however,when he heard a colleague recently had three different research articles accepted for publication.His declining emotional satisfaction is best explained in terms of

A) a happiness set point.
B) relative deprivation.
C) the experience of flow.
D) the adaptation-level phenomenon.