Quick answerStop oxytocin first, reposition, and escalate.
Why this is correctSix contractions in 10 minutes averaged over 30 minutes meet the definition of tachysystole. Recurrent late decelerations show fetal intolerance, so the uterotonic stimulus must be removed immediately and the team should begin protocol-directed resuscitation.
Easy analogy or mental pictureOxytocin is pressing the contraction accelerator; release it before adding another intervention.
Memory hookToo many contractions plus late decels: stop the drip.NCLEX decision ruleRemove the iatrogenic cause first. Reposition, reassess, notify, and use additional measures such as IV fluid or a rapid-acting uterine relaxant according to the clinical protocol and orders.
Why the other choices are wrongIncreasing or continuing oxytocin worsens tachysystole; routine oxygen is not indicated solely for a tracing when maternal saturation is normal.
References
1DailyMed: Oxytocin injectionImmediate discontinuation for uterine hyperactivity or fetal distress
2ACOG practice advisory mirrorNo routine oxygen when maternal oxygen saturation is normal