To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to （）.<br>A:re-adjust the discharge pressure<br>B:clean the expansion valve screen<br>C:add refrigerant<br>D:adjust the expansion valve

To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to （）.
A:re-adjust the discharge pressure
B:clean the expansion valve screen
C:add refrigerant
D:adjust the expansion valve

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