During the Assessment, the Nurse Notices That a Black Baby

During the assessment, the nurse notices that a black baby has a darker, slightly bluish-hued patch about 5 cm by 7 cm on the buttocks and lower back. What is the nurse's next action?

A) Confer with the physician about the possibility of a bleeding tendency.
B) Ask the mother about the cause of the bruise.
C) Call the Department of Social Services (DSS) to report this sign of abuse.
D) Chart the presence of a Mongolian spot.