Ktorý z nasledujúcich spôsobov je účinný na rozšírenie reklamnej stratégie s ohľadom na ochranu súkromia?

The correct answer, "displaying ads to users who are similar to your current high-value customers," is effective for privacy-preserving advertising because it leverages lookalike audiences. This method allows advertisers to reach new potential customers who share characteristics with their existing valuable customers without directly using sensitive personal data for targeting. It relies on aggregated, anonymized data to identify patterns, making it a more privacy-conscious approach than direct targeting based on individual browsing history or personal identifiers. "Displaying ads to users manually created based on marketing strategy segmentation" is less scalable and efficient. "Displaying ads to users on the Display Network and YouTube who randomly search for keywords" is too broad and inefficient, lacking specific targeting. "Displaying ads to users interested in competitors' products" might be effective but doesn't inherently prioritize privacy in its targeting mechanism as much as lookalike audiences do.