An advertising injury liability extension is needed to address liability arising out of the insured’s advertising activities for its goods or services. Standard commercial general liability coverage is primarily built around bodily injury and property damage exposures arising from premises, operations, products, and completed operations. Advertising-related claims may involve allegations connected to promotional material, publications, slogans, marketing content, and competitive positioning. Option D is the best answer because it states the commercial reason for the extension: liability arising from advertising the business’s goods and services. Options A and C are poorly framed because liability insurance does not protect the insured’s own idea or copyright as property; it responds when the insured is alleged to have wrongfully used another party’s protected interest, subject to wording. Option B is a possible type of advertising or personal injury allegation, but the question asks why the extension is needed in addition to ordinary CGL protection. Brokers must identify businesses with active advertising, online content, branding, or promotional campaigns because these activities create liability exposures beyond ordinary physical injury or property damage. References/topics: Liability Insurance; advertising injury liability, CGL extensions, promotional activities, non-physical injury exposures.