The correct answer is C: Your signal strength on the downlink should be about the same as the beacon. A way to determine if your satellite uplink power is neither too low nor too high is to compare your signal strength on the downlink to the beacon strength - they should be about the same. If your signal is much weaker than the beacon, you're using too little power. If it's much stronger, you're using too much power and may be blocking others. For amateur radio operators, this is a practical method for power adjustment that doesn't require special equipment - just listen to the relative signal strengths.