The correct answer is D) All of the above. All three wire rope purchases - luff, rider block, and hoist - may be used with a 30-ton pedestal crane. The size, strength, and configuration of these wire rope components must be appropriate for the crane's safe working load, as specified by the crane manufacturer and Coast Guard regulations. There are no restrictions preventing the use of any of these three wire rope purchases with a 30-ton pedestal crane, provided they are properly sized and installed.