Which of the following is true about the given command?

cat $/$tmp$/$id$\_$dsa.pub $>>$ authorized$\_$keys

The contents of authorized$\_$keys are being piped.

The contents of id$\_$dsa.pub will be written to the authorized$\_$keys file.

The id$\_$dsa.pub file will be overwritten.

All of the contents of authorized$\_$keys will be lost.