What is the medical treatment option for abnormal uterine bleeding using combined oral contraceptives?

I- They can be used safely until menopause.
II- The reduction of menstrual bleeding (probably produced by the endometrial atrophy they produce) with doses of 30ug of ethinyl estradiol has been reported up to 43% of cases.
III- They should be used in correctly selected patients and in low doses.
a) Only statements I and II are correct.
b) Only statements II and III are correct.
c) All statements are correct.
d) None of the statements are correct.