Final answer:
The number of egg rolls in an order and the type of sauce that accompanies them can vary by restaurant. Common sauces include sweet and sour, soy sauce, and spicy mustard.
Step-by-step explanation:
The quantity of egg rolls in an order can vary depending on the restaurant or the specific menu. Some establishments may serve three or four as an appetizer, while others might offer different quantities. The accompanying sauce also depends on the restaurant's menu, but common sauces include sweet and sour, soy sauce, duck sauce, or a spicy mustard. When ordering dishes like chow mein, which includes noodles and vegetables, or fried rice, which combines rice with ingredients like eggs and vegetables, they may come with their own set of sauces that complement the main ingredients.