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: Anatomy
True about ureter: 
Select and explain. 
A. Stas at the hilum, B. Changes its direction at the ischial spine., C. Penetrates the bladder wall without any valve., D. All
D: All
Answer: D: All 
Explanation: A i.e. Stas at hilum; B i.e. Changes its direction at the ischial spine; C i.e. Penetrate the bladder wall without any valve