The correct answer is C) recovery from both the high and low sides. When passive recovery is used on a small appliance with a capillary tube as a metering device and a non-operating compressor, the refrigerant must be recovered from both the high and low sides. This ensures that the entire refrigerant charge is recovered, as the refrigerant will be distributed throughout the system, including both the high and low pressure sides. Recovering from only one side would not remove all the refrigerant, which is important for proper disposal and avoiding venting to the atmosphere. The other options are incorrect because A) recovering from the high side only would leave refrigerant in the low side, and B) recovering from the low side only would leave refrigerant in the high side. D) Venting to the atmosphere is not allowed, as it would release refrigerant into the environment, which is environmentally harmful and often illegal.