Goose312 did add
a transcription of one of Russo's radio interviews on the trade board that adds a little more info. It sounds like the story he got from Tuch's agent was that all 3 were offered and Vegas chose Tuch. However, I think Russo's in the habit of double-sourcing stuff like this before publishing it; I'd guess the most he could confirm with other sources was "discussions."
So the "pick one of these 3" story comes from the agent of the selected player, who wasn't actually there for the conversation. The most that anyone else will cop to is "discussions." Not sure that I'd put a ton of confidence in either story being the whole truth.
It's a little funny how nervous everyone gets about Kaprizov, though
Seems like he wants to play in the NHL and the Wild seem like they'll be thrilled to get him.