多项选择题The SOP of laundry service for the houseperson looks like the following: First, Greetings, including ______ A. Explain to the guests how to get the laundry service. B. Tell the guests how to fill in the laundry list. C. Open the guest room and greet the guest at the front door D. Answer any raised questions. E. Introduce the difference between regular service and express service.