With regard to IAS 16 Property, Plant and Equipment, which of the following statements is true? A. Any assets where management believe the carrying amounts and market values are materially different may be revalued B. Assets which are carried under the revaluation model must be revalued every five years C. Increases in value on an initial revaluation are always credited directly to equity D. The fair value of land and buildings must be determined on an existing use basis