Yes, trueI agree option 3 is the best option in your case. Who do you need to prove? The CRA? If so, just get a good accountant to explain things. Don't worry that you would be asked during citizenship application. For now, you need to worry about your PR Residency Obligation.
I have one more question unrelated to this though
Now I will be moving to Ontario but my flight will be transiting in Montreal, now my question is
Can I insist on stamping my passport in Ontario? Because I know that I will be getting my primary stamp (if any) in Montreal but how about Ontario as a domestic flight?. You know again for the sake of getting the stamp at my main point of entry so that it could be easily tracked and proved