You started the business in 2015, so the answer to "did you start the business in 2016" is clearly no.
Since, as an individual, you are a cash method taxpayer (I'm assuming you did not elect accrual method for your self-employed business) and you were receiving money in 2016, I would suggest that you stopped working in that business in 2016.
The questions have minimal impact in a short-lived business. They are mostly there for the purpose of releasing deferred losses and terminating the service life of depreciable assets.