What factors are linked to an increased risk of pulmonary embolism? Select all that apply.

Cancer and long periods of bed rest increase the risk of blood clots, which can travel to the lungs and cause a pulmonary embolism. Birth control pills can also raise clot risk, and cigarette smoking contributes to that risk. Swimming and jogging are not typical risk factors; regular movement generally helps prevent clots.

AI-written and checked against the verified answer.