Sectional evaporators, installed in a refrigeration plant, control their capacity by
a. Varying the quantity of air passing over the evaporator coils
b. Intermittent operation of the compressor
c. Using solenoid valves to stop the refrigerant flow to one or more evaporator sections
d. Altering the evaporator pressure in one or more of the evaporator sections
e. Switching gear in the compressor
Answer: C