A nurse is reviewing the differences between placenta previa and abruptio placentae with a group of nursing students.Which of the following statements accurately differentiates placenta previa from abruptio placentae?

Choice A rationalePlacenta previa is typically characterized by painless vaginal bleeding, often bright red, especially in the later trimesters as the cervix begins to efface and dilate. Abruptio placentae, on the other hand, often presents with sudden onset of abdominal pain, uterine tenderness, and possible vaginal bleeding, which may be dark red.Choice B rationalePlacenta previa is not typically associated with severe pain or regular contractions, although contractions may occur if labor begins. Abruptio placentae is characterized by uterine tenderness and abdominal pain, which may be accompanied by contractions, and bleeding may or may not be visible externally.Choice C rationalePlacenta previa occurs when the placenta implants in the lower uterine segment, partially or completely covering the internal cervical os. Abruptio placentae involves the premature separation of a normally implanted placenta from the uterine wall before delivery of the fetus, leading to bleeding and potential fetal compromise.Choice D rationalePlacenta previa itself does not inherently increase the risk of maternal hypertension. Abruptio placentae, however, is more commonly associated with pre-existing or pregnancy-induced hypertension due to underlying vascular issues that can contribute to placental separation.