Scaffolds should be inspected both before each work shift and after any events that may affect their structural integrity, making the correct answer D. Both A and B. Regular inspections are vital to maintain workplace safety. ;
Scaffolds must be inspected by a competent person before each work shift and after any events that may impact their structural integrity. Therefore, the correct answer is D: Both A and B. Regular inspections are crucial for maintaining safety standards in construction work.
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