Which of the following is the most important competitive factor in determining a company's ability to secure contracts to supply private-label footwear to chain retailers in a particular geographic region?

Whether the company offers to deliver the orders of chain retailers for private-label footwear in less than 4 weeks

Whether the company agrees to allow the celebrities it has under contract to endorse its branded footwear to also endorse the private-label footwear it supplies

The number of private-label models/styles the company offers to supply

The company's customer service rating

How the company's price offer to supply private-label footwear to the region's chain retailers compares to the price offers of rival footwear companies