which of the following would be accomplished?

If the command below is executed in a user’s home directory, which of the following would be accomplished?
echo hello >> allusers

A.
Sends the message ‘hello’ to all currently logged in users.

B.
Appends ‘hello’ to the end of the file llusers? if it exists.

C.
Sends the message ‘hello’ to all users on the system.

D.
Creates a new file called ‘hello’ and sends it to all users.