Final answer:
The dairy creamer used in restaurants is usually treated by ultra-high-temperature pasteurization (UHT) which involves heating the milk to a temperature of 138 °C for 2 or more seconds.
Step-by-step explanation:
The dairy creamer used in restaurants is usually treated by ultra-high-temperature pasteurization (UHT). UHT pasteurization involves heating the milk to a temperature of 138 °C for 2 or more seconds, effectively sterilizing it, and allowing it to be stored for long periods without refrigeration.