Instead of dealing with any form hassles, I would build your email as described, then setup smart campaign for each option. Create a unique link for each option (if they land at the same page, append a query string value such as www.link.com/thanks?Confirm=Option1), then build the Smart List for each link to trigger on Clicks Link in Email. Select the email, add a constraint for Link, and paste in the full URL. From there you can process these clicks with progression statuses, adding to lists, etc.
If you want to get a little more complex, and potentially a friendlier user experience, you may want to include the option to undo their selection on the confirmation page, or switch to one of the other options.