A 34-year-old woman presents with complaints of vaginal bleeding and pain during intercourse. Her last menstrual period was two weeks ago and was reportedly heavier than normal. She reports that she had saturated two menstrual pads in the past two hours. You should:

A. ask her if she has a family history of uterine cancer.
B. assess vital signs and transport.
C. advise her to insert a tampon to control the bleeding.
D. apply oxygen and start a large-bore IV.