4. On January 1, 2017, Hatlen Company purchases 100% of Wolf Company for $19.2 million. At the time of acquisition, the fair market value of Wolf's tangible net assets (excluding goodwill) is $17.6 million. Hatlen ascribes the excess of $1.6 million to goodwill. Assume that the market value of Wolf declines to $16.0 million and that the fair market value of Wolf's tangible net assets is estimated at $14.7 million as of December 31, 2017 Determine if the goodwill has become impaired and, if so, the amount of the impairment. a. $300,000 impairment b. No impairment c. $1.3 million impairment d. $2.9 million impairment