If you’re using remarketing to reach people who’ve used your mobile app, they see your ads:

If you’re using remarketing to reach people who’ve used your mobile app, they see your ads:
§  while browsing and using Google Maps
§  each time they re-use your mobile app
§  when they enter search terms for products like yours on a mobile device
§  while using other mobile apps on the same mobile or tablet device
The correct Answer is:

§  while using other mobile apps on the same mobile or tablet device