What are the fill line measurements for shaken iced teas in ounces for a small, medium, large, and XL?

The correct answer provides the precise measurements for fill lines of shaken iced teas in ounces for the specified cup sizes. In this case, the measurements of 11 ounces for small, 13 ounces for medium, 15 ounces for large, and 19 ounces for XL align with the standard practices for serving iced teas at Black Rock Coffee Bar.

Understanding these measurements is important as they directly affect the consistency of the beverages prepared. Each fill line ensures that customers receive the right portion, impacting flavor strength and beverage quality. Having accurate fill lines contributes to operational efficiency, as employees can quickly and confidently prepare drinks without discrepancies.

The other options may represent various ounce measurements, but they do not match the specific fill lines established for shaken iced teas at Black Rock Coffee Bar, which is crucial for ensuring both quality service and customer satisfaction.