Which linguistic technique did Coca-Cola successfully use in their 2014 'Share a Coke' campaign that led to a 7% increase in sales?

The intersection of language and retail marketing has created fascinating innovations in how products are presented to consumers. Language choices in advertising and product descriptions can significantly impact consumer perception and purchasing behavior. This poll tests your knowledge about how linguistics has shaped modern retail strategies and consumer experiences. Are you fluent in the language of retail innovation?

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Personalization through first-name labeling (replacing the Coca-Cola logo with common first names)
Neologism (creating the term 'Coke-ify' as a new verb for enhancing social experiences)
Cross-cultural code-switching (using multiple languages on each bottle to appeal to diverse markets)
Phonetic manipulation (changing the pronunciation guide on packaging to emphasize the refreshing sound of opening a bottle)