b$.$ Are users notified of changes in the EULA?

A$.$ Not necessarily, because continued use of the service implies acceptance.

B$.$ Yes, because continued use of the service implies acceptance.

C$.$ Yes, because the user is responsible for checking the EULA for changes.

D$.$ No$,$ because new conditions are added directly to the agreement, without use not approve of the changes, they are not notified of them.