Someone Who Is Not a "Morning Person" Is Often Heard

Someone who is not a "morning person" is often heard saying,"I'm cranky until I've had a cup of coffee." After that first cup of coffee (and a mood improvement) ,the person experiences the uncommon phenomenon of ________.That is,of course,until the stress of a typical day takes its toll.

A) increasing marginal utility
B) decreasing marginal utility
C) constant marginal utility
D) rare utility
E) rebounding utility