Which of these tasks can be done using audience triggers?

  Which of these tasks can be done using audience triggers?  

• Create new audiences based on predictive metrics
• Create new audiences based on specific events that are triggered
• Create new events based on an audience rule being satisfied
• Create new events based on existing event parameters

 

Explanation:

Audience triggers let you trigger events when users match the definition of an audience and become members.

You can trigger events, for example, when users reach key milestones like initiating a certain number of sessions or reading a certain number of articles, or crossing conversion thresholds.

Read more here: https://support.google.com/analytics/answer/993410