Where Do They Come From?

Why is it whenever there is a survey, usually option "c", which is the "undecided/don't know" option always has at least .1% following? You could ask the following:

- Is the sky blue?

a) Yes
b) No
c) Undecided

And you would get some ass that would choose c, not because they want to skew the survey, possibly because they genuinely can't make up their freakin' minds.

CHOOSE DAMMIT!