Final answer:
The lifting insert supporting four times the maximum load simply indicates a safety factor and does not change the actual maximum load it can support. Therefore, the maximum load that can be supported is the same as the maximum load specified for the lifting insert.
Step-by-step explanation:
If a lifting insert supports four times the maximum load, it is essential to understand that the 'maximum load' refers to the maximum weight that the lifting device (insert) can handle before it fails or becomes unsafe to use. Therefore, the maximum load that can be supported is the load that reaches this maximum threshold. Given that the lifting insert can support four times the maximum load, this simply means the lifting device has been designed with a safety factor of 4. This does not increase the maximum load it can support; it just means the insert is stronger than the minimum required to safely support the maximum load.
So, the correct answer to the original question is that the maximum load the lifting insert can support is, quite literally, the maximum load itself because it's the load it was designed to support safely. This would mean the proper choice is 2) The same as the maximum load.