A nurse is caring for four laboring patients. Match each patient's description to the correct stage of labor: Patient A is experiencing regular contractions every 2-3 minutes with complete cervical dilation and begins involuntary pushing efforts. Patient B has mild, irregular contractions and reports only slight cervical effacement and dilation. Patient C has just delivered her baby and is now experiencing mild contractions with a gush of blood. Patient D is resting comfortably, reporting relief after delivery, with uterine firmness and lochia present.