Final answer:
Digital billboards that recognize passersby use facial recognition (option c) software to display targeted ads; this reflects the growing role of technology in personalizing advertising to improve engagement.
Step-by-step explanation:
Digital billboards embedded with facial recognition software can identify passersby and then display ads targeted to them, based on their age, gender, and attention level. This marketing approach represents a significant advancement in the field of advertising, leveraging technology to personalize content in real time. Utilizing facial recognition software, which is capable of analyzing visual data to discern demographic attributes, advertisers can provide a customized experience that theoretically increases the effectiveness of their marketing campaigns.
On a broader scale, the integration of technology in advertising exemplifies how data and analytics are becoming integral to decision-making processes across various industries. From predicting consumer preferences to tailoring political campaigns, the ability to interpret and utilize vast amounts of information is key to staying relevant in today's digital landscape.