Which of These Statements About Emotional Labor Is True

Which of these statements about emotional labor is true?

A) Jobs involving customer service do not require emotional labor.
B) Research indicates that emotional display rules and standards are very similar around the world.
C) Emotional labor increases with the extent to which employees must abide by emotional display rules.
D) Emotional labor occurs when we perceive an inconsistency between our beliefs, feelings, and behavior.
E) Emotional labor demands are higher in jobs requiring more intense emotions.