为了推广一份新报告，Ivan 要创建几则领英广告。他应该将各种内容形式组合起来使用，包括轮播广告和视频广告。

Correct. Combining various content formats like Carousel and Video ads is an effective strategy for promoting a new report on LinkedIn. Carousel ads allow Ivan to showcase multiple aspects, key findings, or chapters of the report in a single ad, engaging users with interactive content. Video ads can capture attention quickly, explain complex information concisely, and build interest in the report through dynamic storytelling. Using a mix of formats caters to different audience preferences and learning styles, increasing the overall reach and engagement for the report. Relying on a single ad format might limit the ad's effectiveness and appeal to a broader audience.