Nurse John is caring for clients in the outpatient clinic. Which of the following phone calls should the nurse return first?

A A client with hepatitis A who states, “My arms and legs are itching.”
B A client with cast on the right leg who states, “I have a funny feeling in my right leg.”
C A client with osteomyelitis of the spine who states, “I am so nauseous that I can’t eat.”
D A client with rheumatoid arthritis who states, “I am having trouble sleeping.”