Reference: IIA Business Knowledge for Internal Auditing, Workstation Security section.

Economic order quantity balances ordering costs and carrying costs to determine the most cost-efficient order size. Under the EOQ model, the order quantity increases when fixed ordering costs increase because placing each order becomes more expensive. To reduce the number of orders, the organization orders larger quantities at one time. Lower annual unit sales would reduce EOQ because fewer units are needed. Higher carrying costs reduce EOQ because holding inventory becomes more expensive, making smaller orders preferable. A higher purchase price may increase carrying cost if carrying cost is calculated as a percentage of inventory value, which would also tend to reduce EOQ. Internal auditors reviewing inventory management should understand how ordering, holding, demand, and pricing assumptions affect inventory decisions. Therefore, Option B is correct.