This is the countries that you would like to work in. You can choose as many as you want.

To make multiple selections, hold down your CTRL key (Apple key for Mac users) while clicking with your mouse on each option you wish to select. You must hold down the CTRL key each time you click another selection, otherwise all selection will be removed. On a PC, the CTRL key is normally located below each shift key, on the bottom row. On a Mac computer, the Apple key is located on either side of the spacebar.