What Should the Nurse Be Aware of with Regard to Fetal

What should the nurse be aware of with regard to fetal positioning during labour?

A) Position is a measure of the degree of descent of the presenting part of the fetus through the birth canal.
B) Birth is imminent when the presenting part is at +4 to +5 cm,below the spine.
C) The largest transverse diameter of the presenting part is the suboccipitobregmatic diameter.
D) Engagement is the term used to describe the beginning of labour.