• Creating as many campaigns as feasible in order to achieve business goals
• Designing campaigns around specified manual optimization levers
• Segmenting account structure according to device and match type as a means of customizing creative
• Focusing account structure on business goals rather than channel silos

The correct answer is: Focusing account structure on business goals rather than channel silos

Explanation: AI-powered solutions allow advertisers to focus their account structures around business objectives, not channel silos. Machine learning can consider factors like match type, device, location, or audience at each auction, eliminating the need for manual segmentation. Therefore, creating an account structure based on business goals and minimizing the number of campaigns can maximize the benefits of machine learning. This strategic approach reduces errors, saves time, and improves ROI by allowing advertisers to focus on refining inputs, optimizations, and decision-making processes.