You can extend your current Microsoft Search campaigns to include Microsoft Audience Ads on the Microsoft Audience Network. You can even use a single budget to manage all your campaigns showing Search ads and Microsoft Audience ads. You can only extend your search campaigns to MSAN for the US, UK, Canada, and Australia. Microsoft Audience Network only supports Text ads, Image-based ads, and Feed-based ads.
This question is a part of the Microsoft Advertising Certified Professional exam. You can find all the answers with detailed explanation for this exam in the Microsoft Advertising Certified Professional exam page.