*Question G2E03:
What symptoms may result from other signals interfering with a PACTOR or VARA transmission?*  

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

### AI Response: (may contain errors)  

PACTOR and VARA are digital modes used in amateur radio for data transmission. They rely on a clear and stable connection to transmit data effectively. When other signals interfere with these transmissions, several symptoms can occur:

1. **Frequent retries or timeouts**:  
   - Interference can cause data packets to be lost or corrupted, leading to the need for retransmission. This results in frequent retries and potential timeouts if the data cannot be successfully sent within a certain timeframe.

2. **Long pauses in message transmission**:  
   - Interference can disrupt the flow of data, causing delays. The system may pause to wait for a clear channel or to attempt retransmission of lost packets, leading to long pauses.

3. **Failure to establish a connection between stations**:  
   - If interference is severe, it may prevent the initial handshake or connection setup between stations, making it impossible to start the data transmission.

Since all these symptoms can result from interference, the correct answer is:

- **D: All these choices are correct**

**Why the other choices are incorrect:**

- Choices A, B, and C each describe a symptom that can occur due to interference. However, they are not incorrect; they are simply individual symptoms. The question asks for all possible symptoms, which is why choice D, encompassing all of them, is the most comprehensive and correct answer.

In summary, interference can cause a range of issues in digital transmissions like PACTOR and VARA, and understanding these symptoms helps in diagnosing and mitigating interference problems.