Final answer:
A parent/child relationship should be used to share Floodlight tags and audience lists between multiple Advertisers. The correct answer is d.
Step-by-step explanation:
The account structure that should be used to share Floodlight tags and audience lists between multiple Advertisers is D. A parent/child relationship.
A parent/child relationship allows for the central organization and management of Floodlight tags and audience lists. In this structure, the parent account acts as the central hub, and the child accounts can access and utilize the shared resources.
For example, suppose there is a parent account for a digital marketing agency and several child accounts for different clients. By using a parent/child relationship, the agency can create and manage Floodlight tags and audience lists at the parent level and share them with the respective child accounts for implementing in the clients' advertising campaigns. The correct answer is d.