Question：Under what circumstances can purchased positive goodwill that has been previously impaired be reversed (ie. its value be reinstated)?
　　A. Only where a third party has made a takeover bid that supports evidence of the increase in value.
　　B. It is not possible to reverse an impairment of goodwill.
　　C. Wherever the directors consider it to be necessary.
　　D. Where the previous impairment happened as a result of exceptional external events and there is evidence of reversal.
　　The correct answer is:It is not possible to reverse an impairment of goodwill.
　　This change was introduced as part of the IASB Improvement Project (2003).