Due to an error in computing depreciation expense, Orcas Corporation overstated accumulated depreciation by $$20$ million as of December $31,2020.$ Orcas has a tax rate of $30\%.$ Orcas' retained earnings as of December $31,2020$ would be: A$.$ understated by $$14$ million, B$.$ overstated by $$14$ million, C$.$ overstated by $$6$ million, or D$.$ understated by $$6$ million.