Final answer:
Functional obsolescence is typically incurable.
Step-by-step explanation:
Out of the options provided, functional obsolescence is typically incurable.
Functional obsolescence refers to a depreciation in value or usefulness of a property or asset due to factors that make it no longer competitive or desirable in the market.
Unlike physical depreciation, which can be repaired or improved, functional obsolescence is typically a permanent condition that cannot be easily fixed or reversed.