*Question G2B03:
What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?*  

*Correct Answer is  C: Attempt to resolve the interference problem with the other stations in a mutually acceptable manner*  

### AI Response: (may contain errors)  

In amateur radio, good operating practice is essential for maintaining a positive and cooperative environment among operators. Let's break down the question regarding what to do when propagation changes during a contact, leading to interference from other stations.

### Correct Answer: C
**Attempt to resolve the interference problem with the other stations in a mutually acceptable manner.**

- **Why this is correct:**
  - Amateur radio is based on cooperation and good operating practices. When interference occurs, the best approach is to communicate with the other stations involved to find a solution that works for everyone. This could involve changing frequencies, adjusting power levels, or coordinating times to transmit. This approach fosters goodwill and helps maintain a friendly atmosphere in the amateur radio community.

### Why the Other Choices are Incorrect:
- **A: Advise the interfering stations that you are on the frequency and that you have priority.**
  - This is incorrect because it promotes a confrontational attitude. No amateur operator has absolute priority on a frequency, and asserting such can lead to disputes and further interference. The amateur radio service is governed by the principle of sharing frequencies and cooperating with others.

- **B: Decrease power and continue to transmit.**
  - While decreasing power may reduce interference, it does not address the underlying issue of cooperation. Continuing to transmit without resolving the interference can lead to frustration for all parties involved and does not promote good operating practices.

- **D: Switch to the opposite sideband.**
  - This option may not be effective in resolving interference. Switching sidebands (USB vs. LSB) does not guarantee that the interference will stop, and it may simply move the problem to another frequency. It is better to communicate with the other stations to find a solution.

### Summary
In summary, the best practice when faced with interference due to changing propagation conditions is to communicate and collaborate with other operators. This not only resolves the issue but also upholds the spirit of amateur radio.

### Useful Rule of Thumb
- Always prioritize communication and cooperation in amateur radio operations. If interference arises, consider discussing the situation with other operators to find a mutually agreeable solution.