During the Physical Examination,the Nurse Notes That a Female Patient

During the physical examination,the nurse notes that a female patient.has an inverted left nipple.Which statement regarding this is most accurate?

A) Normal nipple inversion is usually bilateral.
B) A unilateral inversion of a nipple is always a serious sign.
C) It should be determined whether the inversion is a recent change.
D) Nipple inversion is not significant unless accompanied by an underlying palpable mass.