Answer:
The correct answer is - combination contraceptive pills, if she skip reminder or placebo pills of pack she might skip the period.
Step-by-step explanation:
Combination birth control pills or oral contraceptive pills are combination of hormones estrogen and progesten in a pack of 28 pills. In these 28 pills, 21 pills called active pills that contain hormones while rest 7 pills are placebo or reminder pills that cause light menstrual period every month.
On the given information we can say that Sadie is on combination contraceptive pills and she can skip her period by skip reminder pills and take active pills.
Thus, the correct answer is - combination contraceptive pills, if she skip reminder or placebo pills of pack she might skip the period.