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

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