A 50-year-old has a simple 3 cm ovarian cyst on ultrasound and normal CA-125; she is asymptomatic and postmenopausal. What is the BEST management?

1. AImmediate total abdominal hysterectomy
2. BStaging laparotomy within one week
3. CRepeat ultrasound and CA-125 in 4–6 months
4. DStart platinum-based chemotherapy