Answer:
The average number of times inventory is sold during the period.
Explanation:
Inventory turnover by definition is the relationship between inventories and the cost of goods sold by a firm. It measures on average, how many times the inventory was restocked and sold in the operating period.
A higher number usually suggests a healthier operation cycle for a business.
It is measured by,
Inventory turnover = Cost of goods sold / Average inventory
Option 1 and Option 3 are related to the performance of accounts receivables. Option 3 is the closest to above mentioned definition. Option 4 is only measuring the inventory clearance time.
Hope that helps.