Final answer:
The correct statement is that depreciation should be computed using the MACRS straight-line method over the MACRS ADS recovery period, and no recapture is required.
Step-by-step explanation:
The correct statement in this case would be option A. When the business use of listed property drops to 50% or below, the depreciation for the current and future years must be computed using the MACRS straight-line method over the MACRS ADS recovery period, but no recapture is required.
Recapture is required only when the business use drops to less than 50%, which is not the case in this scenario. Therefore, options B, C, and D are all incorrect.
By using the MACRS straight-line method, the depreciation expense is spread evenly over the recovery period, regardless of the change in business use. This ensures that the depreciation expense is based on the asset's useful life and not affected by changes in usage.