Which of the following is NOT true about setting two applications to share same Linux ID?

A.
Both applications must be running in background to check if they are sharing same Linux
ID.

B.
The applications just need to be installed on single device, for checking their Linux ID,
they need not to be running.

C.
Android’s adb tool can be used to check the applications that if they are sharing same
Linux ID.

D.
Making two applications sharing same Linux ID must have same value of sharedUserID in
AndroidManifest.xml.