What are the benefits of using a CDN for Bootstrap?

Question $8$ options:

$1)$

It reduces the loading time of your web pages by serving Bootstrap files from a nearby server

$2)$

It ensures that you always have the latest version of Bootstrap available for your web pages

$3)$

It saves you bandwidth and storage space by not having to download or host Bootstrap files yourself

$4)$

It does all of the above benefits