A nurse is caring for a 6-month-old infant. Which of the following findings should indicate to the nurse that the client is experiencing pain following a procedure?

A. A decreased respiratory rate is not a typical sign of pain in an infant and may indicate other issues. B. Increased formula consumption is not a specific indicator of pain and could be related to other factors like hunger or comfort. C. Increased crying episodes are a common sign of pain in infants, as they often use crying to express discomfort or distress. D. Decreased heart rate is not typically associated with pain and may indicate other conditions.