Which Principle Should Guide the Trauma Nurse's Plan of Care

Which principle should guide the trauma nurse's plan of care for a pregnant woman?

A) Pregnant women have a 45% increase in plasma volume.
B) Pregnant women can lose up to 50% of blood volume before showing signs of hypovolemia.
C) In hypovolemia, the body shunts blood to the pregnant uterus.
D) The pregnant women shows signs of shock before the fetus.