Can a guest substitute a small salad for a side item?

The option stating that a guest can always substitute a small salad for a side item is correct because many restaurants have flexible menu policies that allow guests to customize their orders to enhance their dining experience. This practice recognizes that guests often have preferences for healthier options or simply enjoy salads as part of their meal.

In this context, restaurants aim to accommodate guest requests to enhance satisfaction and ensure that the dining experience meets individual tastes. This flexibility can also be part of the establishment’s customer service philosophy, making it more appealing for diners to have choices over their meals.

When considering the other statements, they may limit the scenario in ways that aren't typically reflective of restaurant practices, which prioritize guest satisfaction and customization as key components of service. Therefore, allowing such substitutions as a standard practice aligns well with an inviting and responsive dining environment.