It has been proved that "Muzak" can ______.
A.improve productivity
B.create a pleasant atmosphere
C.cause an entire factory to sleep
D.all of the above
A.待顾客走近时,询问顾客是否需要纸巾
B.顾客进门前,让顾客先在门口的地垫上将鞋蹭干净
C.点餐时,询问顾客是否需要点一杯热饮
D.顾客离开时,提醒顾客小心,下雨地滑
A.Linda Fargo
B.Nick Wooster
C.Justin O'shea
D.Jeffrey Kalansky