The correct answer is C. just in time purchasing.
Just-in-time (JIT) purchasing is a method of inventory management in which materials and components are delivered to a manufacturing facility just as they are needed for production. This approach helps to reduce inventory costs and improve efficiency by eliminating waste.
Economic order quantity (EOQ) purchasing is a method of inventory management that determines the optimal order quantity for a product based on the costs of ordering and carrying inventory. EOQ purchasing can help to reduce costs by minimizing the amount of inventory that is held.
Annual purchasing is a method of inventory management in which all of the materials and components for a product are purchased at the beginning of the year. This approach can help to reduce costs by taking advantage of volume discounts. However, it can also lead to higher inventory costs if the product is not sold quickly.
In conclusion, just-in-time purchasing is the best option for buying goods or materials for production in a way that they are delivered directly on manufacturing facility of company.