Which intangible assets are amortized over their useful life? A all of these B trademarks C goodwill D patents

The correct answer is D patents.<br /><br />Patents are intangible assets that are amortized over their useful life. Trademarks can have indefinite lives and are not necessarily amortized unless they have a finite life. Goodwill is not amortized but is instead tested for impairment annually.