Which of the following demonstrates best practices for designing mobile ad creative?

Adding closed captions for sound-off consumption is a best practice for mobile ad creative because a significant portion of mobile users watch videos with the sound off. Captions ensure your message is still conveyed effectively, improving accessibility and engagement. Using Redditisms like 'TIL' can be effective for organic content but might not be universally understood or appropriate for all ad campaigns, and it's not a design best practice for the creative itself. Including your brand logo is important for brand recognition but doesn't specifically address mobile consumption habits or creative design best practices for engagement. Using only carousel ads limits your creative options and doesn't account for the diverse ways users consume content; a mix of ad formats is generally more effective.