During the Oral Assessment of a 30-Year-Old Patient of African

During the oral assessment of a 30-year-old patient of African descent,the nurse notes bluish lips and a dark line along the gingival margin.What would the nurse do in response to this finding?

A) Check the patient's hemoglobin for anemia.
B) Assess for other signs of insufficient oxygen supply.
C) Proceed with the assessment,knowing that this is a normal finding.
D) Ask the patient if he had been exposed to an excessive amount of carbon monoxide.