When checking for non-condensables inside recovery cylinder, why should the technician allow the temperature of the cylinder to stabilize to room temperature before taking a pressure readinga) to prevent safety valves from puging refrigerantb) it is a quick method of determining a refrigerant level inside the tankc) comparisons to a pressure temperature chart are only valid if both the pressure and temperature of the refrigerant are stable and knownd) a temperature reading alone is enough to determine refrigerant quality