A 34-year-old at 33 weeks presents with painless vaginal bleeding. The resident prepares for a digital cervical exam. What should the nurse do?

Rationale: A. Stopping the digital cervical exam and advocating for ultrasound is correct because painless third-trimester bleeding may indicate placenta previa, where digital exams are contraindicated due to the risk of severe hemorrhage. B. Encouraging ambulation is unsafe in suspected placenta previa, as movement can precipitate bleeding. C. Administering oxytocin is inappropriate; stimulating contractions in placenta previa could worsen hemorrhage. D. Allowing the exam with sterile gloves ignores the risk of provoking life-threatening bleeding and is unsafe.