What is it essential to make a positive first impression in the online booking service? A: Dressing code B: Staff communication skills C: Food quality D: Room ervice

客房送餐服务是饭店为方便客人、增加收入、体现饭店服务水准而提供的服务项目。客房送餐员在进入客人房间前要先按门铃，接着礼貌地说（）。 A: ABELLBOY B: BDOORMAN C: CROOMS ERVICE D: DHOUSE KEEPING