A 33-year-old woman who is 36 weeks pregnant is experiencing scant vaginal bleeding. During transport, you note that she suddenly becomes diaphoretic, tachycardic, and hypotensive. In addition to administering 100% oxygen, you should:

A. place her in a left lateral recumbent position.
B. position her supine and elevate her legs 12?.
C. carefully place sterile gauze into her vagina.
D. assist her ventilations with a bag-mask device.

Answer: A. place her in a left lateral recumbent position.