你正在協助國內花卉經銷商規劃新廣告活動所需的廣告素材。 請問廣告素材放送程序涵蓋下列哪些步驟？

The correct answer outlines the key steps in the creative serving process within Campaign Manager 360. Creative rotation rules determine how multiple creatives are displayed (e.g., sequential, even, optimized). Creative weights (referred to as "比率" or ratio in the options) assign a proportion to each creative, influencing how often it's shown relative to others. Creative priority allows you to specify which creative should be served over others if multiple are eligible. Creative scheduling (時段設定) defines specific times or dates when a creative should be active. The other options include elements that are not core steps in the serving logic (like creative length or type) or use less precise terminology.