A client with gestational diabetes, at 39-weeks gestation, is in the second stage of labor. After delivery of the fetal head, the nurse recognizes that shoulder dystocia is occurring. Which intervention should the nurse implement first?

A. Lowering the head of the bed and applying suprapubic pressure (McRoberts maneuver) is the first and most effective intervention to free the impacted shoulder during shoulder dystocia. B. Flexing the thighs (also part of McRoberts maneuver) is important but typically comes with lowering the head of the bed; applying suprapubic pressure is the immediate next step. C. Emergency cesarean is not practical after the head is delivered; maneuvers to relieve shoulder dystocia should be attempted first. D. Hands-and-knees position can help but is not the first action during acute shoulder dystocia after delivery of the head.