**Core Concept**
Pasteurization is a process used to kill pathogens and extend the shelf life of milk by applying heat for a short duration. The Holder method is one of the traditional pasteurization techniques used in dairy industries. It involves heating milk to a specific temperature for a specified period.

**Why the Correct Answer is Right**
The Holder method involves heating milk to 63°C (145°F) for 30 minutes. This temperature and time combination is sufficient to kill most pathogens, including bacteria and viruses, without significantly altering the nutritional properties or flavor of the milk. The low temperature and longer holding period in the Holder method help to minimize the denaturation of proteins and the destruction of vitamins.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because the temperature is too low to achieve effective pasteurization.
**Option B:** Incorrect because the time is too short to kill all pathogens.
**Option C:** Incorrect because this option is not a recognized pasteurization method.

**Clinical Pearl / High-Yield Fact**
The Holder method is a traditional pasteurization technique that has been widely used in the dairy industry. It is essential to follow the correct temperature and time combination to ensure the safety and quality of milk products.

**Correct Answer: D. 63°C (145°F) for 30 minutes**