What visual clues on a system can indicate the presence of a refrigerant leak?

A) Oil stains around the area of the leak
B) A greenish stain around the area of the leak
C) A visible cloud of refrigerant in the area of the leak
D) Refrigerant bubbles forming around the leak


A

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A) 10% B) 5% C) 25% D) 13% E) 18%

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