Jims restaurant is launching a new campaign and would like greater exposure on mobile devices to attract users on the go. How can this be done

Jims restaurant is launching a new campaign and would like greater exposure on mobile devices to attract users on the go. How can this be done?
  A)  Create a dedicated campaign for each mobile device targeted
  B)  Use the same bids across all devices
  C)  Enable a bid adjustment to bid more aggressively on mobile devices
  D)  Enable a bid adjustment to bid less aggressively on mobile devices