Answer:
C. The individual unit owner
Step-by-step explanation:
Based on what you actually own, your maintenance responsibilities for the property – and therefore your repair costs, and so on – will vary.
Normally, a unit owner is made responsible for managing all that is a part of his unit system.
For instance, if you identify a "unit" in your condominium complex to include the outside shutters on your windows, it will be your responsibility to maintain that.
If they collapse off from each other a few years after you move in, you probably won't be able to get help from the home owners association (excluding proof that they were defective at first).