Which statement about Performance Max campaigns is true?

Performance Max campaigns are designed to optimize advertising efforts by utilizing machine learning across various Google inventory sources, all under a single campaign structure. This allows advertisers to reach audiences effectively without the need to create specific campaigns for each individual channel, such as Search, Display, YouTube, and others. By consolidating the campaign management into one Performance Max campaign, advertisers benefit from a more streamlined approach, as the system automatically allocates budget and creatives where they are likely to perform best, maximizing reach and efficiency.

The other statements do not align with the structure and capabilities of Performance Max campaigns. They may imply a level of segmentation or limitation that contradicts the campaign's integrated nature and its focus on leveraging automation for cross-channel performance.