The nurse is caring for a client in the second stage of labor and suddenly the delivering provider yells "shoulder dystocia". What is the priority action by the nurse?

Rationale: A. Suprapubic pressure is an important intervention but usually follows positioning maneuvers. B. The McRoberts maneuver, which involves flexing the mother's thighs sharply toward her abdomen, is the first-line and priority action to relieve shoulder dystocia by widening the pelvis and facilitating delivery. C. The Woodscrew maneuver is a rotational technique used by the provider if initial maneuvers fail but is not the nurse’s first priority. D. The Rubin maneuver is another provider-performed rotational technique used after initial steps; not the nurse’s immediate action.