Why isn't the cost approach usually not used to determine the value of older properties?

• A. Appraisers aren't allowed to use the cost approach on structures that are older than 10 years.
• B. It's difficult to accurately estimate depreciation with an older property.
• C. Lenders and insurance companies don't require it.
• D. No one wants to pay to have an older property appraised using the cost approach.

Answer: (B)