Which of the following items should a server have on hand while serving?

Having a tray, notepad, pen, and menu knowledge is essential for a server to provide excellent service. A tray allows the server to efficiently carry multiple items, which is crucial during peak times when balancing several orders is necessary. The notepad and pen enable the server to accurately take orders, ensuring that they capture the details of what each guest wants, which reduces the risk of mistakes that could lead to dissatisfied customers.

Menu knowledge is equally important, as it allows the server to confidently answer questions about dishes, make recommendations, and inform guests about ingredients and potential allergens. This knowledge not only enhances the dining experience but also builds trust with guests, who appreciate informed guidance.

The other options lack a combination of tools and information necessary for effective service. For instance, simply having a pen and notepad does not equip the server to handle multiple orders efficiently, while carrying just a tray and menus may leave the server unprepared to answer questions or take detailed orders. Having cash and receipts, while important for processing payments, does not contribute to the immediate needs of serving guests and ensuring their dining satisfaction.