You are answering a USMLE-style medical question. Question: A previously healthy 18-month-old boy is brought to the physician by his parents for evaluation of an abdominal mass noticed a few days ago. He appears markedly pale and lethargic. Examination shows a 6-cm, nonmobile mass in the left upper quadrant that crosses the midline. 24-hour urine collection shows elevated homovanillic acid and vanillylmandelic acid. Further evaluation including biopsy confirms the diagnosis of intermediate-risk neuroblastoma. The physician recommends the established standard treatment, which is initiation of neoadjuvant chemotherapy followed by surgical resection, if possible. After a thorough discussion of the risks and benefits of chemotherapy, the likelihood of unresectability without neoadjuvant treatment, and the prognosis without it, the patient's parents steadily refuse chemotherapy because they do not want their son to suffer the side effects. They prefer to take their son home for supportive care only. Which of the following is the most appropriate action by the physician? Options: A) Help the parents to arrange supportive care at home B) Refer the patient to another oncologist C) Recommend for parents to take 2 weeks to think about decision D) Seek a court order for neoadjuvant chemotherapy Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.