If the conventional retail method is used to approximate lower-of-cost-or-market measurement, which of the following describes the proper treatment of net additional markups and markdowns in the cost- retail ratio calculation? O A. Net markups and markdowns should both be excluded OB. Net markups and markdowns should both be included OC. Net markups should be included, and net markdowns should be excluded OD. Net markups should be excluded, and net markdowns should be included