What account structure should be used to share Floodlight tags and audience lists between multiple Advertisers?

What account structure should be used to share Floodlight tags and audience lists between multiple Advertisers?

• An account/advertiser relationship
• A parent/child relationship
• Shared billing profiles
• A single Floodlight activity

Correct answer is

• A parent/child relationship

Explanation: In this arrangement, the parent advertiser defines a collection of Floodlight activities, tags, and settings (called a Floodlight configuration), and all of the child advertisers inherit the configuration.

Read more here: https://support.google.com/searchads/answer/2458167