This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
In a suspected of ovarian cancer, imaging work-up is required for? 
Select and explain. 
A. Characterization of the lesion, B. Staging, C. Assess resectability, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: The roles of diagnostic imaging have been to characterize the ovarian mass, determine the extent of preoperative disease and predict tumor resectability. Ref: National Guidelines (U.S.) (Staging and follow up of ovarian cancer).