In auditing intangible assets, an auditor most likely would review or recompute amortization and determine whether the amortization period is reasonable in support of management's financial statement assertion of:
　　a. Valuation and allocation.
　　b. Existence.
　　c. Rights and obligations.
　　d. Completeness.
　　Explanation
　　Choice "a" is correct. Assertions about valuation and allocation deal with whether assets, liabilities, and equity interests have been included in the financial statements at appropriate amounts. Recalculation of the amortization and review of the amortization period would test the valuation and allocation assertion.
　　Choice "b" is incorrect. Assertions about existence deal with whether assets, liabilities, and equity interests exist at a given date. Evaluating amortization does not relate to this assertion.
　　Choice "d" is incorrect. Assertions about completeness deal with whether all assets, liabilities, and equity interests that should be presented in the financial statements are so included. Evaluating amortization does not relate to this assertion.
　　Choice "c" is incorrect. Assertions about rights and obligations deal with whether assets are the rights of the entity and liabilities are the obligations of the entity at a given date. Evaluating amortization does not relate to this assertion.