【单选题】

Questions 158-160 refer to the following notice.

Please refamiliarize yourselves with the following pool safety precautions.As a recreation manager, you are responsible for discussing those regulations with your staff at your next weekly meeting. We must be assured that our facility is in full compliance with the laws and regulations of Welton.
· General pool safety and conduct rules must be posted in an area clearly visible to all pool patrons.
· The gate must be locked and secured whenever lifeguard staff are not on duty.
· Pools must maintain appropriate chlorine levels at all times to ensure the health of guests.
· Patio and grass areas surrounding pools must be inspected once every hour and kept free of debris.
·Emergency phone numbers for police and ambulance services must be provided to all your lifeguards while on duty.
Any questions with regard to these regulations may be directed to Mr. Philippe Morgan,Division of Public Safety.
Welton MunicipalBuilding
1750 Welton Street,
Denver,Colorado 80202
Tel: 313-895-1204
For whom is this notice most likely intended
A、Mr. Philippe Morgan
B、Lifeguard staff
C、Recreation managers
D、Guests at a swimming pool