so i decided i may root my nexus . but heres the thing i downloaded Galaxy nexus toolkit and it shows different versions i circled mine in the pic but it says USA with google wallent. but im in canada on rogers wireless do i still choose the option. and whats the chances of my phone becoming brinked

 

Hey thanks i thought it was yakju when i select it it starts downloading imgs and stuff i dont wanna flash a rom i wanna unlock boot loader and root my phone . do i need a different program. i still wanna keep my img and get updates from samsung