Which of the following patients is at highest risk for developing pulmonary embolism (PE)

a.21-year-old male with a hemophilia bleeding disorder
b.28-year-old woman who had a baby 6 months earlier
c.36-year-old woman with a history of al-cohol abuse who is recovering from a gas-tric ulcer
d.72-year-old male who is recovering from hip replacement surgery in the hospital

ANS:DA 72-year-old is at risk for immobility and at increased risk for PE.