Hey
I believe Matt Cutts once said that keywords in a URL help a "little bit" (1). That was like back in 2009 though so whether that is still a direct factor in the algorithm who knows. If so it would only be a 1% thing.
Looking at your three options I would be staggered if there was any ranking difference between the three of them. Personally I like #1 best if you have no specific business section on the site and #2 if you do have a business section with other articles on the site. #3 looks a bit spammy and over long (for SEO's sake only).
Ultimately though this is the wrong way to look at things - you need to look at things the way Google wants us to look at things and do what is best for your user. You want a URL that clearly indicates what the page is about and that would look good pasted into a blog post or forum or some such. You want a URL that looks the part in
You then want to make sure that everything else is helping clearly illustrate what this page is about:
- URL (our entry point)
- Page Title
- Internal Navigation / Anchors
- Breadcrumb if used
- H1 tags
- Page content
- Domain level keyword content
- External links if relevant / possible / quality etc
This is just such a tiny thing overall that I really would not sweat it - do what is right for your users and what makes most sense and the SEO aspects will take care of themselves.
Hope that helps
Marcus
References
1. http://searchengineland.com/googles-matt-cutts-on-keywords-in-the-url-16976