You are answering a USMLE-style medical question. Question: The parents of a 14-year-old patient are concerned and have questions about the use of insulin for their son’s recently diagnosed type 1 diabetes. The patient has developed an upper respiratory infection while at school. He is coughing and has a runny nose. His temperature is 37.8° C (100.2° F) and vital signs are within normal limits. Physical examination is unremarkable. Which of the following modifications to his insulin regimen would you recommend to this patient and his parents? Options: A) Increase the frequency of blood glucose checks. B) Reduce the insulin dose. C) Continue same regimen. D) Hold insulin until the patient gets better. Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.