What would be covered under the business personal property coverage of a BOP?

Desks, filing cabinets, and other office equipment the insured uses in her business
An enclosure around the front entry to a store that the insured tenant had built when he began leasing the building

A and B are correct. Property owned and used by the insured in the business and tenants improvements and betterments made at the tenants expense that cannot be legally removed are covered under Business Personal Property coverage. Materials that are on or within 100 feet of the premises being used for alterations, such as the cans of paint in Choice C, are covered under Building coverage. Personal property used to maintain or service the building, such as the fire extinguishers in Choice D, are also covered under Building coverage.