The correct answer is D — Customer injured on the business premises. The Businessowners Policy liability section protects an eligible business against covered legal liability for bodily injury, property damage, and personal and advertising injury arising from covered business operations. A customer who is injured on the insured premises represents a classic premises-liability exposure.

Option A concerns first-party property damage to the insured building. A roof damaged by a covered windstorm would therefore be analyzed under the BOP property section, not business liability coverage.

Option B is incorrect because bodily injury to an employee arising out of and in the course of employment is generally excluded from ordinary BOP business liability coverage and is instead addressed by Workers Compensation and Employers Liability insurance.

Option C is also incorrect in the ordinary BOP liability form because bodily injury arising from ownership, maintenance, or use of autos is subject to the policy's auto exclusion. Commercial auto exposures typically require separate Business Auto coverage or an applicable BOP endorsement for limited hired/nonowned auto liability.

The official Series 17-70 blueprint expressly tests the Businessowners liability coverage form, coverages, exclusions, who is an insured, limits, general conditions, and hired/nonowned auto endorsements.

Therefore, D is correct.