I went with cause before I really thought about it. Because I don't know if I'd want to know what my expiry date is. You can at the very least try to avoid the thing that causes your death.

Like plane crash = don't travel by plane. Unless that just means a plane will crash into you. :P

Elevator crash = take the stairs

car accident = well that could happen any time you get in a car

choking = just eat soft food for the rest of your life lol

if it's by disease, there's nothing you can really do to avoid that anyway. I mean, it'd probably affect your attitude to fight it and stuff. I think that'd be the worst if you found out the cause and it was some disease.