Answer:
a.
Step-by-step explanation:
The response " I can wait 3 to 4 days after intercourse to start taking these to prevent pregnancy. " would indicate the need for further explanation. This is because Plan B is a series of contraceptive pills, which are most effective if taken immediately after unprotected intercourse and then again 12 hours later. Waiting 3-4 days would be the wrong method of using the pills.