In Reference to International Accounting for Goodwill,U

In reference to international accounting for goodwill,U.S.companies have complained that past U.S.accounting rules for goodwill placed them at a disadvantage in competing against foreign companies for merger partners.Why?

A) Previous rules required immediate write off of goodwill which resulted in a one-time expense that was not required under international rules.
B) Previous rules required amortization of goodwill which resulted in an ongoing expense that was not required under international rules.
C) Previous rules did not permit the recording of goodwill,thus resulting in a lower asset base than international counterparts would recognize.
D) All of the above are correct.