Final answer:
Regular temperature milk is typically pasteurized using high-temperature short-time (HTST) pasteurization, where it is exposed to a temperature of 72 °C for 15 seconds.
Step-by-step explanation:
The temperature of regular temperature milk is not specified in the question. However, based on the provided information, regular temperature milk is typically pasteurized using high-temperature short-time (HTST) pasteurization. During HTST pasteurization, milk is exposed to a temperature of 72 °C for 15 seconds.
This helps lower bacterial numbers without affecting the quality of the milk. Therefore, the correct option from the given choices would be 4) 70°C.