Which of the following statements is correct?

Ad groups allow for the organization of your ads within a campaign. Each ad group can contain multiple creatives (e.g., different images, videos, or text variations) that all align with the overarching campaign objective. This structure enables testing and optimization of various ad designs and messages to see which performs best for a specific audience or targeting strategy. The statement "A campaign must have more than one ad groups" is incorrect because a campaign can function with just one ad group. The statement "One ad group can have different types of audiences" is incorrect because audience targeting is typically set at the ad group level, meaning an ad group is usually targeted to a specific audience segment, not multiple disparate types.