*Question G2C05:
What is the best speed to use when answering a CQ in Morse code?*  

*Correct Answer is  B: The fastest speed at which you are comfortable copying, but no faster than the CQ*  

### AI Response: (may contain errors)  

To determine the best speed to use when answering a CQ in Morse code, let's analyze the correct answer and the other options.

### Correct Answer: 
**A: The fastest speed at which you are comfortable copying, but no slower than the CQ.**

- **Explanation**: When responding to a CQ, it's important to match the speed of the CQ to ensure effective communication. If the CQ is sent at a certain speed, responding at a speed you can comfortably copy (but not slower than the CQ) allows for a smoother exchange. This ensures that both parties can understand each other without frustration.

### Why the Other Choices are Incorrect:

- **B: The fastest speed at which you are comfortable copying, but no faster than the CQ.**
  - **Incorrect**: While it is true that you should not exceed the speed of the CQ, the emphasis on "no faster" is misleading. The key is to be comfortable and not slower than the CQ, which is captured in the correct answer.

- **C: At the standard calling speed of 10 wpm.**
  - **Incorrect**: While 10 words per minute (wpm) is a common calling speed, it may not be appropriate if the CQ is sent at a different speed. The best practice is to match or exceed the CQ speed as long as you are comfortable.

- **D: At the standard calling speed of 5 wpm.**
  - **Incorrect**: Similar to option C, 5 wpm is a standard speed but may be too slow if the CQ is sent faster. The focus should be on comfort and matching the CQ speed.

### Summary:
- Always respond at a speed you can comfortably copy, ensuring it is not slower than the CQ speed. This facilitates effective communication and helps avoid misunderstandings.

### Rules of Thumb:
- **Match the CQ Speed**: Always aim to respond at the same speed as the CQ.
- **Comfort is Key**: Choose a speed that you can comfortably copy to ensure accurate communication.