Generate a 500-word article outlining a process for creating highly effective TikTok hook scripts.  The article should cover various hook types (e.g., question hooks, problem/solution hooks, curiosity gaps, surprising statements, relatable scenarios),  incorporating examples for each.  It must also address A/B testing strategies for hook optimization, focusing on metrics such as watch time, completion rate, and engagement (likes, comments, shares).  The article should include a template for structuring a TikTok hook script, considering factors such as target audience, platform trends, and call to action.  Finally, the article should discuss the integration of trending audio and visual elements to enhance hook effectiveness. The overall tone should be practical and actionable, offering clear, step-by-step guidance for content creators aiming to improve their TikTok engagement.