(A) Oxytocin stimulates labor but should not be used until CPD (cephalopelvic disproportion) is ruled out in a dysfunctional labor. (B) This answer is the correct protocol for oxytocin administration, but the medication should not be used until CPD is ruled out. (C) This answer is the correct manner to interpret effective stimulation, but oxytocin should not be used until CPD is ruled out. (D) This answer is the appropriate nursing action because the scenario presents adysfunctional labor pattern that may be caused by CPD. Oxytocin administration is contraindicated in CPD.