Final answer:
Shelby is selecting an effective sales promotion strategy for a new appliance, which could be an in-person demonstration, trade show, or coupon campaign, aligning with historical advertisement strategies.
Step-by-step explanation:
Shelby is examining the types of sales promotion most effective for launching a new type of appliance by Kenmore. Considering the high effectiveness despite the increased labor costs, she might choose a method such as an in-person demonstration, a trade show, or a high-value coupon campaign aligning with historical strategies that capitalized on the allure of new models and features, as seen with advertisements of the nineteenth century.
The ultimate goal is to appeal to customers' desire for innovation and convenience, similar to how past advertisements emphasized qualities like unbreakability or nonstick surfaces to entice buyers.