Which of the following is a sign that a customer has been drinking before arriving?

A sign that a customer has been drinking before arriving can often manifest in their ability to conduct routine tasks, such as retrieving their money. If a customer exhibits noticeable trouble with such a simple, everyday action, it may indicate that their coordination and cognitive functions are impaired, which can be a direct result of prior alcohol consumption.

This behavior can be more concerning compared to other options like a cheerful demeanor or polite interaction, which may not necessarily indicate intoxication. Similarly, steady walking suggests that a person has good control over their movements, which would typically not align with signs of prior intoxication. Therefore, if a customer seems to struggle with retrieving their money, it serves as a practical cue that they may have been drinking prior to their arrival.