LLC question on filling out a W-9?

I have an LLC. On the W-9, there's a space to check Limited Liability Company and then your check your tax clification as D (disregarded entity), c (corporation) or p (partnership). I figured that is where I check, but I don't know which clification. I was thinking since I want to file individual with business taxes, I could check "D"... How off am I here? Am I completely wrong and do I need to check sole proprietorship since there is just one owner?