Strike Price for Valuation of Call

In q.10 of 2013 afternoon mock, the binomial model assumes the strike price of the option to be 30 million even though the question explicitly states that “IIG will have to option to purhcase 50% of project for EUR 32 million at any time”

Why isnt the strike price 32 million then?

This one confused me too…

I think it was an error on cfai’s behalf

Anyone else seen this?