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A
They must be served more
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B
Service should stop, and staff should help ensure the patron's safety, such as arranging safe transport
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C
They must drive home
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D
They should be ignored
Why this is the answer
An important on-premise rule is that once a patron is intoxicated, alcohol service must stop, and staff should take reasonable steps to help ensure the patron's safety — such as offering water and food, monitoring them, and arranging safe transportation like a taxi or rideshare rather than letting them drive. Continuing to serve, or pushing the patron out to drive impaired, increases harm and liability. Managing intoxicated patrons safely and lawfully is a core on-premise responsibility that protects the patron, the public, and the establishment.
Source: Responsible Beverage Service — Intoxicated Patrons On-Premise