Affiliate Marketing Secrets

I made a website and I joined the Best Buy Affiliate Program to sell best buy products on my website. I have to fill in information for the tax form W-9. There are business types to choose from on the form and I’m not sure what type an affiliate site would fit under. The types are Sole Proprietorship/Individual, Corporation, LLC/LCC, Non Profit/Government, and Other. Can anyone tell me what type an affiliate site would fall under?