On January $1,2021,$ Halpert Inc. acquired $30\%$ of Schrute. It no longer had the ability to exercise significant influence over the operations of Schrute. How should Halpert account for this change

A$.$ Halpert should report the effect of the change from the equity to the fair$-$value method as aretrospective change in accounting principle

B$.$ Halpert should continue to use the equity method to maintain consistency in its financial statements

C$.$ Halpert has the option of using either the equity method or the fair value method for $2021$ and future years

D$.$ Halpert should use the fair value metjod for $2022$ and future years, but should not make a retrospective adjustment to the investment account

E$.$ Halpert should restate the prior years' financial statements and change the balance in the investment account as if the fair value method had been used since $2021$