What action should be taken before using any mechanical lifting device?

Answer: C — Both A and B

Before using any mechanical lifting device, it is crucial to check the manufacturer's manual and stabilize the area around the device. Consulting the manufacturer's manual provides essential information about the device’s specifications, operational procedures, weight limits, safety protocols, and maintenance guidelines. This knowledge can significantly reduce the risk of accidents and equipment damage. Additionally, stabilizing the area around the lifting device is vital for safety. Ensuring that the surrounding environment is secure helps prevent accidents due to tripping hazards, falling objects, or instability caused by uneven surfaces. Taking these two steps together creates a safer working environment and maximizes the effective use of the mechanical lifting device, ensuring that both the operator and surrounding personnel are protected during its operation.