A nurse manager is discussing proper body mechanics with the nursing staff. Which of the following should the nurse include when teaching about lifting heavy objects?

A. Tightening the abdominal muscles helps stabilize the spine and core, providing support and reducing the risk of back injury when lifting heavy objects. Engaging the core is a key principle of proper body mechanics. B. Bending at the waist places excessive strain on the lower back and increases the risk of injury. Proper technique involves bending at the knees and hips while keeping the back straight. C. Holding objects away from the body increases leverage on the spine, making lifting more dangerous. Proper technique requires holding objects close to the body to reduce strain and maintain balance.