Select the best answer for the question 14. After treating the expansion valve with a blast of CO2 from a fire extinguisher, you've determined that the valve is defective. What part of the test led you to
this conclusion?
O A. The valve allowed CO2 to leak through the vents
OB. The low-side pressure failed to go into a vacuum
O C. The flow of refrigerant to the evaporator became blocked
O D. The accumulator temperature became higher than the orifice tube temperature,

The correct option is;

C. The flow of refrigerant to the evaporator became blocked

Explanation:

The function of the expansion valve is the reduction in the refrigerant pressure entering the evaporator so as to enable the desired change from liquid to gaseous state in the evaporator with the temperature of the high pressure refrigerant that enters into the expansion valve being warm

The expansion valve controls the liquid refrigerant flowing between the low and high pressure areas of the refrigerator

The expansion valve supplies the liquid refrigerant to the evaporator coil ensures a reduction in pressure of the refrigerant before the refrigerant enters the  evaporator coil.