1. Before attempting to lift any material, __ a. look for any protruding nails wires, or sharp edges b. use a safety harness c. ask your supervisor for help d. ensure the stacking ratio is no greater than 3:1

The correct answer is a. look for any protruding nails wires, or sharp edges.<br /><br />Before attempting to lift any material, it is important to inspect the material for any potential hazards such as protruding nails, wires, or sharp edges. This helps to ensure the safety of the person lifting the material and prevents any injuries or accidents that may occur.