Gordon has analyzed these results using vertical common-size analysis to determine trends, The performance of Gordon can best be characterized by which one of these statements? a- The common-size gross profit percentage has decreased as a result of an increasing common-size trend in cost of goods sold. b- The increased trend in the common-size gross profit percentage is the result of both the increasing trend in sales and the decreasing trend in cost of goods sold. c- The common-size trend in cost of goods sold is decreasing which is resulting in an increasing trend in the common-size gross profit percentage. d. The common-size trend in sales is increasing and is resulting in an increasing trend in the common-size gross profit margin