To optimize a client’s campaign to get the most out of her mobile advertising, you can:

set a mobile bid adjustment for the campaign based on insights from estimated cross-device conversion and total estimated conversion data
use the maximize clicks flexible bidding strategy to increase the number of clicks her ads get from users viewing her ads on mobile devices
set shorter conversion windows to capture users who convert after researching on multiple devices
edit the campaign’s ad text to include information about how customers can purchase her product on their computers

The correct answer is:

set a mobile bid adjustment for the campaign based on insights from estimated cross-device conversion and total estimated conversion data.