Choose the best example of the pay-per-post model.

The pay-per-post model is characterized by a brand compensating an influencer for creating and publishing a single piece of content, such as an Instagram photo, a TikTok video, or a blog article. This is a direct transaction for a specific deliverable. "Brand pays a fee for each app download the influencer drives" describes an affiliate or performance-based model, where payment is tied to conversions, not just content creation. "Brand sends the influencer a custom PR package with gifts" is a form of gifting or in-kind compensation, not a direct monetary payment for a post. "Brand pays a monthly fee to an influencer" represents a retainer or long-term brand ambassador agreement, which involves ongoing compensation for multiple posts or activities over time, rather than a single post.