Final answer:
The topic of Argile's training is most likely Etiquette, as it addresses professional interaction with customers through speech, body language, and manners. The example from Gavi's Fast Food Restaurant illustrates how good etiquette resolved issues, benefiting both customers and staff.
Step-by-step explanation:
Argile's training would most likely focus on Etiquette, which encompasses the most appropriate ways to interact with customers using professionalism in speech, body language, and manners. Professional etiquette in a business setting plays a crucial role in building relationships with customers by ensuring that interactions are respectful, polite, and considerate.
An example of effective customer service etiquette can be drawn from a situation at Gavi's Fast Food Restaurant. The manager listened to customer complaints about the confusing line-up system and took decisive action by implementing floor markings, which led to reduced stress among customer service clerks and improved the overall customer experience.