The home care nurse is assessing a 3 week old child with history of bilateral clubfoot noted at birth. The mother reports that the infant has been increasingly irritable in the last day. Assessment findings include: bilateral leg casts in place, child is irritable; pallor and coolness of left foot is noted. What is the nurse's priority action?

A. Range of motion exercises are not appropriate with casts in place and do not address the urgent symptoms. B. Assessing for skin breakdown is important but does not address the immediate priority. C. Pallor and coolness indicate compromised circulation, which requires immediate intervention to prevent tissue damage. D. Cast care is essential but does not address the urgent vascular concern.