Which of the following are advantages of implementing Google Tag Manager?

3) Which of the following are advantages of implementing Google Tag Manager?

a) You can change configuration values in your mobile app without rebuilding a new binary 
b) You can add Google Analytics tags to your site without editing site code 
c) You can add non-Google tags to your site without editing site code 

d) You can add AdWords tags to your site without editing site code

All