Question 65 of 75. Nonresidential real property in the U.S. (such as office buildings, factories, and workshops) placed in service on or after May 13, 1993, is depreciated using The straight-line method over 31.5 years. The straight-line method over 39 years. O A 150% declining basis method over 31.5 years. A 150% declining basis method over 39 years