Which custom solution allows advertisers access to premium placement on Amazon'shomepage?

Video content as a co-marketing campaign with Amazon is the correct answer because Amazon offers custom advertising solutions, including co-marketing campaigns that can feature video content, to select advertisers. These campaigns often secure premium placements, such as on the homepage, due to their collaborative nature and high production value. Easter eggs using unique shopping queries and experiential advertising campaigns such as pop-up stores are not standard custom solutions for securing premium homepage placement on Amazon. While creative, these options do not directly align with Amazon's established advertising offerings for homepage visibility.