Marketing Analytics and the Modern Data Scientist

A large ecommerce company has allocated a hefty budget for marketing activities before its upcoming sale event--its biggest in the year. The marketing team needs to come up with the messaging to be delivered during the marketing campaign to attract maximum customers. The big question is what should that messaging be? Should it be, "Get the best discounts," or should it be, "Get the best international brands," or will "Get best quality at best rates" work better? Should all three messages be employed?