NEW POLL: Which of ABBA's studio albums has the best artwork?

Now that the song championship is over, I will be returning to my regular weekly polls covering a variety of topics related to ABBA. This week's polls is... Which of ABBA's studio albums has the best artwork? ABBA have 9 studio albums, but which of these do you think has the best cover art?

LINK TO POLL: https://strawpoll.com/polls/6QnMORoLoZe