A 63-years old women complaint of vaginal bleeding 3 weeks, but her LMP was around age 56. P
E: heart, lungs, abdomen are all normal, no vaginal or cervical lesions, uterus size was 8-10weeks, no tenderness, and transvaginal-ultrasound showed endometrial thickness was 18mm. Which of the following is the most likely diagnosis? （ ）
选项：

A:Cervical cancer ;
B: Leiomyoma of uterus ;
C:Ovarian tumor;
D:Endometrial carcinoma;
E:Perimenopause