The correct answer is A. A business interruption or Business Income claim requires documentary evidence sufficient to establish what the business would probably have earned had the covered loss not occurred. Financial records are therefore indispensable. Relevant documentation commonly includes profit-and-loss statements, sales records, payroll information, general ledgers, prior financial statements, income-tax returns, and associated tax schedules.
The standard Business Income coverage conditions authorize the insurer, as often as reasonably required, to examine the insured's books and records and make copies. This enables the adjuster to reconstruct historical income, determine continuing and noncontinuing expenses, identify trends, evaluate the period of restoration, and calculate the actual Business Income loss.
An examination under oath can also be required during a claim investigation, but it is not the best answer to what specifically assists with the business interruption calculation. Furniture and fixture inventories principally support physical property claims. An onsite inspection likewise assists investigation but does not provide the financial evidence needed to quantify lost earnings.
The official Series 17-70 outline specifically tests Business Income/Extra Expense, Business Interruption/time element, and the insured's duty to produce books and records after loss.