What are some benefits of using remarketing in your paid search campaign?

Connect with customers who have visited your website before.
Create additional opportunities to re-engage with customers who have abandoned their shopping cart.
Create a higher cost per acquisitions compared to the same ads without remarketing in paid search
Upsell or cross-sell to previous buyers.

The correct answer is:

Connect with customers who have visited your website before.
Create additional opportunities to re-engage with customers who have abandoned their shopping cart.
Upsell or cross-sell to previous buyers.