Which of the below statements is true for private auction deals?

The correct answer is All of these are true because all the statements accurately describe aspects of private auction deals. In a private auction deal, an exclusive group of advertisers is given priority to bid on open inventory, which means that only selected advertisers are invited to participate in the auction for specific ad inventory. Additionally, private auction deals can involve varying CPM (Cost Per Thousand Impressions) across multiple sites, allowing advertisers to pay different prices for inventory on different websites based on the auction dynamics and competition. Finally, private auction deals typically work on a second-price auction model, where the highest bidder wins the impression but only pays the second-highest bid price, which is a common feature designed to make the auction more competitive and fair.