Which one of the following is an advantage of having production facilities to manufacture athletic footwear in all four geographic regions?

Maximum ability to achieve all available production$-$related economies of scale and thereby achieve a production cost advantage over rivals having production operations in only $1,2,$ or $3$ geographic regions

Increased ability to reduce payments for import tariffs $($because having production operation in all four geographic regions typically enable a company to reduce$--$maybe totally eliminate$--$its shipments of footwear into North America, Europe$-$Africa, Latin America, and the Asia$-$Pacific from production facilities outside these regions$)$

Increased ability to gain volume discounts on purchases of superior materials and thereby lower the company's costs of using superior materials in producing branded footwear

Increased ability to reduce companywide spending for best practices training of production workers because the best practice training benefits gained at one production facility are automatically transferred to other facilities at zero cost

Increased ability to benefit from investing in production improvement options, particularly when it comes to lowering labor costs per pair and increasing the S$/$Q ratings of branded pairs