My option isn't listed, so I voted for the closest possible one. I'd normally say no way, even with 50% retention and multiple first round picks coming back, but San Jose is likely to be pretty bad in upcoming years, so there's a chance if I was sent 2-3 first round picks along with Karlsson, I might get a top 5 pick out of it. At that point, I could justify it. If the team was clearly going to be competitive without Karlsson, I'm not accepting that trade, even with 50% retention and 2-3 first round picks coming back. San Jose doesn't have good prospects either. Late firsts and middling prospects are not enough to justify such a huge albatross, even at 50% retention.
Let's face it. Karlsson is already declining fast because of injuries and has seven years left. Do I think he'll be worth anywhere near a 5.75M player the last 3-4 years of that contract? No, and it'll only cause problems for the team because you aren't going to sit a Hall of Fame defenseman in the press box, so you'll have no other choice than to have him as your 3RHD for the last 3-4 years of that contract, he'll play on the PP and likely pick up some points, and be a big negative elsewhere. You'll be overpaying for that role on your team, and it could cost you re-signing a player you want to re-sign.