单选题

A、 The common-size gross profit percentage has decreased as a result of an increasing commonsize trend in cost of goods sold.
B、 The common-size trend in sales is increasing and is resulting in an increasing trend in the common-size gross profit margin.
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 margin.
D、 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.

【正确答案】 A

【答案解析】