Explanation
The prevention slide lists **lifestyle modifications**, **folic acid supplementation**, and **antithrombotic therapy (LDA)**. It additionally advises avoiding vaginal or rectal examination and penetrative intercourse in placenta praevia. The other answer choices introduce measures not listed or contradict the lecture’s stated prevention points.\n\n**Key takeaway:** The lecture’s general prevention list includes lifestyle modification, folic acid, and LDA; praevia also calls for specific avoidance measures.\n\n**Glossary:** **LDA**: Low-dose aspirin, as represented by the lecture’s abbreviation; **antithrombotic**: Intended to reduce thrombosis or clot formation.
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