Which is grammatically corret?

[belltrio]

What would you like to do (C)that/what others have told you is impractical or impossible?

The answer is that. I'm not happy with this sentence because I found it a little complicated. Could anybody suggest better ways of paraphrasing it?

[probus]

Is there anything that you would like to do, but have not tried because other people have told you that it is not possible or not practical?

[belltrio]

Thank you very much!!