If an account manager is new to using Custom Audiences as an audience solution for a newVideo action campaign, what implementation suggestion should they try?

● Layering as many Audience types as possible within the same ad group.
● Using five of the best-converting placements from their Display campaigns.
● Using 10 to 15 of the best-converting keywords from their Search campaigns.
● Combining Custom Audiences with Demographic Audiences in the same ad group.