C. Authenticator App
(Optional) Download this or any other Authenticator App and install it on your phone: https://2fas.com/
Step 1: After you have downloaded your phone app, click the "Set up using an app" button.
Step 2: Enter a name for this authentication setup.
Step 3: Scan the QR Code on this screen with your authentication app on your phone and enter the 6-digit code shown to you in the box at the bottom of this screen.