What must be ensured about wire rope clips used in lifting?

In lifting operations, ensuring the integrity and safety of wire rope clips is crucial. Proper spacing and torque are necessary to maintain secure connections that can withstand the forces exerted during lifting. When wire rope clips are installed, they must be spaced appropriately to avoid damaging the wire rope and to allow for the correct amount of grip without slippage. Additionally, ensuring that they are torqued to the manufacturer's specifications is essential, as improper torque can lead to failure during use.

This attention to detail helps prevent accidents and ensures a safe working environment. Proper installation practices for wire rope clips are a fundamental aspect of safe rigging and lifting operations, making this the correct answer.