Final answer:
In the case of a client in labor with profuse vaginal bleeding, a nurse should report sharp fundal pain with uterine tenderness and increases in maternal pulse and fetal heart rate reactivity, as these are signs of potential obstetric emergencies.
Step-by-step explanation:
The question refers to a clinical situation where a client in labor exhibits signs of potential complications. Among the options provided, the nurse should report the findings related to sharp fundal pain and uterine tenderness (A) as these could indicate serious conditions such as placental abruption or uterine rupture, which are obstetric emergencies requiring immediate attention. Increased pulse and changes in fetal heart rate reactivity (D) are also concerning signs that could signify maternal hemorrhage or fetal distress, necessitating urgent intervention by the healthcare provider.