Agree with Charlie: if you only allow one choice, you can do this with a single form, single dropdown, and then run campaigns based on the data value change.
If you want to customize the experience and get more complicated, you might have links to separate landing pages for each section, and then run your smart campaign based on completing the specific form on each page. Then you wouldn't have the problem of accidental clicks, but you'll gain information on who is interested in multiple tracks.