Which of the following is NOT true about “TestOnly” attribute in <application> tag?

A.
Indicates whether this application is only for testing purposes.

B.
If this attribute is set to true, the application can only be installed through adb.

C.
It may expose functionality or data outside of itself that would cause a security hole, but is
useful for testing.

D.
It is system level attribute so it is included in manifest tag.