Which of the following actions is likely to enhance the S/Q rating of branded pairs produced at a particular plant?

Increasing expenditure for best practices training for workers is a strategic action that is likely to enhance the S/Q (Style/Quality) rating of branded pairs produced at a plant. This improvement stems from the fact that well-trained workers are typically more skilled and proficient in their tasks, leading to higher quality production processes. Enhanced training can ensure that employees are aware of the latest manufacturing techniques, quality control measures, and design standards. As a result, this can yield higher-quality products that meet or exceed consumer expectations, contributing to a better S/Q rating.

In contrast, while implementing a new marketing campaign may boost visibility and potentially sales, it does not directly impact the quality of the product itself. Offering discounts on footwear may encourage sales but typically does not affect the product's quality or style rating. Similarly, reducing the number of models produced could streamline operations and potentially improve focus, but it does not guarantee an enhancement in the standard of quality unless accompanied by improved training practices. Thus, investing in worker education is the most direct way to improve the S/Q rating.