*Question G8C16:
Which of the following provide digital voice modes?*  

*Correct Answer is  D: DMR, D-STAR, and SystemFusion*  

### AI Response: (may contain errors)  

The correct answer to the question about which options provide digital voice modes is:

**D: DMR, D-STAR, and SystemFusion.**

### Explanation of the Correct Answer:
- **DMR (Digital Mobile Radio)**: A digital radio standard that supports voice and data communications. It uses time division multiple access (TDMA) to allow multiple users to share the same frequency.
- **D-STAR (Digital Smart Technologies for Amateur Radio)**: A digital voice and data protocol developed by the Japan Amateur Radio League (JARL). It allows for voice communication and can also transmit data.
- **System Fusion**: A digital communication system developed by Yaesu that supports both voice and data. It allows for seamless communication between analog and digital modes.

These three modes are specifically designed for digital voice communication, making them the correct choice.

### Explanation of Incorrect Answers:
- **A: WSPR, MFSK16, and EasyPAL**:
  - **WSPR (Weak Signal Propagation Reporter)**: A digital mode used for low-power communication and propagation studies, not for voice.
  - **MFSK16**: A digital mode primarily used for data transmission, not voice.
  - **EasyPAL**: A digital mode for image transmission, not specifically for voice.

- **B: FT8, FT4, and FST4**:
  - All three are digital modes used for data transmission, particularly in weak signal environments. They are not designed for voice communication.

- **C: Winlink, PACTOR II, and PACTOR III**:
  - **Winlink**: A system for sending and receiving email over radio, primarily data-oriented.
  - **PACTOR II and PACTOR III**: Protocols used for data transmission, especially in maritime communication. They do not support voice.

### Summary:
- **Digital Voice Modes**: DMR, D-STAR, and SystemFusion are specifically designed for voice communication.
- **Data Modes**: WSPR, MFSK16, EasyPAL, FT8, FT4, FST4, Winlink, and PACTOR protocols are primarily for data transmission.

This distinction is crucial for understanding the capabilities of different digital modes in amateur radio.