Why does it make sense to use the navigation API of SAPUI5 and concepts such as eventbus or the navcontainer functions of the base application?

Why does it make sense to use the navigation API of SAPUI5 and concepts such as eventbus or the navcontainer functions of the base application?
A . The eventbus concept is deprecated and should no longer be used.
B . Using the navigation API, the configuration of routes and targets are clearly separated from the application implementation.
C . Using the navigation API, it is possible to use bookmarks.
D . The NavContainer of the App object is not accessible inside a component-based Uapp.

Answer: B,C