In 2020, Antle Inc. had acquired Demski Co. and recorded goodwill of $320 million as a result. The net assets (including goodwill) from Antle's acquisition of Demski Co. had a 2021 year-end book value of $655 million. Antle assessed the fair value of the Demski reporting unit at this date to be $775 million, while the fair value of all of Demski's identifiable tangible and intangible assets (excluding goodwill) was $712 million. The amount of the impairment loss that Antle would record for goodwill at the end of 2021 is:

a. 257 million

b. 63 million

c. 120 million

d. 0