The correct answer is D) All of the above. Pedestal cranes have limit switches to restrict the movement of the turntable limits, slew travel limits, and luff travel limits. These limit switches are safety features designed to prevent the crane's movements from exceeding their designated ranges, which could lead to damage or unsafe conditions. Restricting the movement of these three key functions helps ensure the crane operates within its designed parameters and reduces the risk of accidents or malfunctions. The other options (A, B, and C) are incorrect because they only mention one or two of the limits that are typically controlled by limit switches on pedestal cranes, whereas the correct answer covers all three.