During Inspection of the Soft Tissue,the Therapist Notes a Blue

During inspection of the soft tissue,the therapist notes a blue discoloration of the skin and nail beds.What does this tell the therapist?

A) Cyanosis usually indicates a lack of oxygen and excessive carbon dioxide in the superficial blood vessels.
B) Pallor usually indicates a decrease in blood flow or blood hemoglobin secondary to anemia or shock.
C) Erythema usually indicates increased blood flow and inflammation in a localized area of the body.
D) Clubbing usually indicates chronic hypoxia associated with cardiovascular or respiratory disease.