Answer:
(d) Straight-line method (SL), the same convention as used in the first year of depreciation, ADS recovery period
Step-by-step explanation:
The straight line method is the best to use, the convention to be used is the same as what was used in the first year of depreciation and the recovery period in 2019 is the ADS recovery period.
To decrease annual deduction, it is standardized that ADL is used with straight line method with 31 plus years for a recovery period that is longer.