Which scenario is most likely to explain a company$$s inventory turnover ratio falling from $4$ to $2\mathrm{.}5?$

A$.)$

The company's cost of goods sold has decreased while the average inventory has remained constant.

B$.)$

The company's cost of goods sold has increased while the average inventory has decreased.

C$.)$

The company's cost of goods sold has remained constant while the average inventory has decreased.

D$.)$

The company's cost of goods sold has increased while the average inventory has remained constant.

$+$