Final answer:
The inventory turnover ratio indicates how often a company sells its average merchandise inventory in a period, distinct from market concentration measures like the four-firm concentration ratio and the HHI. option (A)
Step-by-step explanation:
The ratio that measures the number of times a company sells its average level of merchandise inventory during a period is known as the inventory turnover ratio.
This is different from the four-firm concentration ratio and the Herfindahl-Hirschman Index (HHI), both of which are used to measure the extent of competition in a market. However, if you are interested in how effectively a company is managing its inventory, the inventory turnover ratio is the key metric to look at.