You are either doing contract work to extend your existing runway -- you saved up 6 months expenses, and the contract work is what allows you to let the business build for a few extra months (in which case you have a runway and the fourth option applies) -- or doing it to survive the next few months (in which case the last option applies)

Even though I disagree that it's a separate category, I added " You have an existing job and are continuing either full time or part time while you start the business"

Ditto. Contracting to make it work.