You are answering a USMLE-style medical question. Question: A 3rd year resident in good standing with his residency training program would like to work more hours outside his residency obligations to gain more experience and pay for his medical school loans. He currently works and trains 60 hours per week as a resident and has a 10-hour shift external to his residency program on Saturdays. He is free of any educational and work obligations on Sundays. Based on the most recent standards set by the Accreditation Council for Graduate Medical Education (ACGME), which of the following is the most accurate statement regarding this resident’s moonlighting and patient safety? Options: A) He is already overcommitting and must reduce the number of hours B) He is not allowed to work outside the scope of his residency training C) He may work longer shifts D) He may work up to 20 more hours Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.