Final answer:
The upsell option on a quesadilla is a sales strategy offering additional, premium toppings or a combo to enhance the meal and increase revenue.
Step-by-step explanation:
The upsell option on a quesadilla refers to a sales technique where a customer is offered an additional product or service to enhance the main product, which in this case is the quesadilla.
For example, an upsell for a quesadilla could be offering extra meat, premium toppings such as guacamole or sour cream, or suggesting a combo that includes a drink and sides. This is a common practice in the food service industry and is used to increase the transaction size, thereby increasing the restaurant's revenue.