A 45-year-old woman undergoes total abdominal hysterectomy for large fibroids. On postoperative day 2, she develops flank pain, reduced urine output, and ultrasound shows unilateral hydronephrosis. During surgery, the uterine artery was ligated close to the cervix. Which anatomical structure was most likely injured?
B
Ureter at the level of uterine artery crossing