A 26-year-old client is admitted to the labor, delivery, recovery, postpartum unit.

(A) This nursing action may cause hyperventilation. (B) This nursing action could cause inferior vena cava syndrome. (C) The client is allowed to push only after complete dilation during the second stage of labor. The nurse needs to know the stages of labor. (D) If the client pushes before dilation, it could cause cervical edema and/or edema to the fetal scalp; both of these could contribute to increased risk of complications.