The Nurse Is Seeing a Patient Who Asks About the Accuracy

The nurse is seeing a patient who asks about the accuracy of Nagele's rule. The nurse explains that accuracy can be compromised when:

A) There is a history of regular menses every 28 days.
B) Amenorrhea is present and ovulation occurs with breastfeeding.
C) Oral contraception was discontinued, but no regular menstruation was established.
D) There has been one or months of amenorrhea.
E) There is an accurate date for the last menstrual period.