The pelvic part of ureter
选项：

A:descends immediately behind the internal iliac artery.
B:crosses lateral to the external vessels, umbilical artery, obturator nerve and vessels.
C:crosses anteriorly over the ductus deferens (male).
D:passes lateral to the fornex of the vagina and is crossed by uterine artery.
E:ends on the inferior of the urinary bladder as the internal urethral orifice.