Which of these is the correct explanation of Android security functions?

A.
Android provides standard authentication mechanisms, such as user authentication and device
authentication.

B.
Since Android does not provide encryption functions as standard, it is necessary to separately
embed a library.

C.
An Android application cannot refer to information persisted by another application.

D.
To use some functions such as networking and hardware, configuration at the time of
development as well as user usage approval is necessary.

Explanation: