*Question T1F06:
[97.119(c)] Which of the following self-assigned indicators are acceptable when using a phone transmission?*  

*Correct Answer is  D: All these choices are correct*  

### AI Response: (may contain errors)  

In amateur radio, self-assigned indicators are used to indicate the operator's location or station. The question asks which of the given self-assigned indicators are acceptable when using a phone transmission.

1. **Correct Answer Explanation**:  
   The correct answer is **D: All these choices are correct**. In amateur radio, operators can use various symbols to indicate their location or station. The terms "stroke," "slant," and "slash" are all acceptable ways to denote a temporary or special operation. They are interchangeable in this context and can be used to indicate the operator's call sign followed by the location or special designation.

2. **Other Choices Explanation**:  
   - **A: KL7CC stroke W3**: This is acceptable as "stroke" indicates a temporary operation.
   - **B: KL7CC slant W3**: This is also acceptable; "slant" serves the same purpose as "stroke."
   - **C: KL7CC slash W3**: This is acceptable as well; "slash" is another term used for the same indication.

   Since all three options (A, B, and C) are valid forms of self-assigned indicators, they all lead to the conclusion that D is correct.

3. **Useful Rules of Thumb**:  
   - When using self-assigned indicators, remember that they are meant to clarify your operational status or location.
   - The terms "stroke," "slant," and "slash" can be used interchangeably in this context, and all are acceptable in phone transmissions.

This understanding is crucial for the Extra Class exam and for proper communication practices in amateur radio.