An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.<br>A:oil foaming in the compressor<br>B:higher than normal suction and discharge pressures with a higher box temperature<br>C:higher than normal discharge pressure with a normal box temperature<br>D:the compressor to run continuously

An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
A:oil foaming in the compressor
B:higher than normal suction and discharge pressures with a higher box temperature
C:higher than normal discharge pressure with a normal box temperature
D:the compressor to run continuously

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