What two pieces of information does Google Analytics Dynamic Remarketing use to show website visitors ads for content they previously viewed?

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What two pieces of information does Google Analytics Dynamic Remarketing use to show website visitors ads for content they previously viewed?
(select all that apply)

·         Hit and session attributes collected via the Data Layer
·         Products the user has +1’d in Google Plus
·         User information from the Analytics cookie
·         Hit and session attributes collected from AdWords
GA
Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.