Answer:
C). Prescribing oral contraceptives and having her start them the same day, with a back-up method used for the first seven days
Step-by-step explanation:
Having a negative urine pregnancy result doesn't necessarily mean Ashley is not pregnant. A negative pregnancy test result also means that there is no presence of human chorionic gonadotropin (hCG) in the urine. A negative urine pregnancy test may also mean that the test was performed too early, or that, she drank too much liquid before performing the test.
Oral contraceptives help prevent pregnancy by making cervical mucus thick and slowing the tubal motility.
Since Ashley has a negative urine pregnacy result, the appropriate plan of care for her would be to start taking the oral contraceptives the same day as the visit with a back-up method used for the first seven days.