It seems to me that Isaac remains the main option and the other options are just a way to show that Liverpool are not limited in their choice (a way to strengthen their negotiating position). In general, Liverpool is behaving very strangely (after so many years of relative modesty) on the transfer market - they have already broken the transfer record by buying Wirtz and now want to break it by buying Isaac. It turns out that in one transfer window Liverpool will spend more than 250 million euros.