## **Core Concept**
The process of cremation involves the reduction of a deceased body to its basic elements through combustion. High temperatures are used to achieve this, with variations in temperature protocols depending on the specific cremation technology and regulatory standards.

## **Why the Correct Answer is Right**
In the cremation process, especially in modern facilities, a temperature range of 900-1000°C is often utilized to ensure complete combustion of the body. This high-temperature phase is critical for breaking down the organic materials and reducing them to ash. The duration for which this temperature is maintained can vary, but it is typically applied for a significant portion of the cremation process to ensure thorough combustion.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Without specific details on the duration, it's hard to directly refute this option. However, if it's significantly shorter than what is typically required for complete combustion at such temperatures, it would be incorrect.
- **Option B:** Similarly, this option's accuracy depends on the standard protocols for cremation. If it doesn't align with recommended practices for maintaining high temperatures during cremation, it would be considered incorrect.
- **Option D:** This option would be incorrect if it suggests a duration that is longer or shorter than what is necessary or standard for achieving complete combustion at 900-1000°C.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that cremation processes and temperatures can vary significantly by jurisdiction and technology. However, the use of high temperatures (around 900-1000°C) for a controlled period is crucial for efficient and environmentally compliant cremation.

## **Correct Answer:** C.