Which of these is the correct precaution when publishing an application update to the Android
Market?

A.
The package name must be the same, but the .apk may be signed with a different private key.

B.
The package name does not have to be the same and the .apk can be signed with a different
private key.

C.
The package name must be the same and the .apk must be signed with the same private key.

D.
The package name does not have to be the same, but the .apk must be signed with the same
private key.

Explanation: