Cassie Owns Equipment ($45,000 Basis and $30,000 FMV) and a Building

Cassie owns equipment ($45,000 basis and $30,000 FMV) and a building ($152,000 basis and $158,000 FMV) , which are used in Cassie's business. Cassie has used straight- line depreciation for both assets, which were acquired two years ago. Both the equipment and the building are destroyed in a fire, and Cassie collects insurance proceeds equal to the assets' FMV. The tax result to Cassie for this transaction is a

A) $15,000 Sec. 1231 loss and a $6,000 Sec. 1231 gain.
B) $15,000 Sec. 1231 loss and a $6,000 ordinary gain.
C) $15,000 ordinary loss and a $6,000 Sec. 1231 gain.
D) $15,000 ordinary loss and a $6,000 ordinary gain.