The Obstetrical Nurse Checks the Station of a Laboring Pregnant

The obstetrical nurse checks the station of a laboring pregnant woman and documents+5 on the client chart. What does this number mean in terms of the delivery?

A) The baby is "floating" above the mother's ischial spines.
B) The fetal head is at the vaginal opening.
C) The lowest part of the fetal skull is at the level of the mother's ischial spines.
D) The presenting part is 5 cm above the level of the ischial spines.