Final answer:
To determine if a customer can get French Onion soup with the combo, they should check the restaurant's menu or ask the staff, as it depends on how the establishment structures its combo deals.
Step-by-step explanation:
Whether a customer can get the French Onion soup with the combo depends on the restaurant's menu options. Some establishments offer fixed combo menus, while others allow for customization. To get a definitive answer, it's best to consult the menu or ask the staff at the particular restaurant in question. When considering menu choices like this, customers look for variety, customization options, and value for money, all of which a combo with French Onion soup could potentially offer.