A 26-year-old pregnant woman, gravida 2, para 1-0-0-1, is 28 weeks pregnant when she experiences bright red, painless vaginal bleeding. On her arrival at the hospital, which diagnostic procedure will the client most likely have performed?
A. Transvaginal ultrasound for placental location
B. Internal fetal monitoring
C. Contraction stress test (CST)
D. Amniocentesis for fetal lung maturity