Take context from the input text and decide on the accurate relationship between 'Air Berlin' and 'Etihad Airways' from the options provided.
Options: parent organization, publisher, legal form, business division

And he said he could not envisage getting into the kind of partnership low-cost rival Air Berlin (Xetra: AB1000 - news ) has forged with Abu Dhabi-based Etihad Airways , which also now controls Alitalia.
parent organization