In my experiencd with IRCC, just send what the forms are asking for, man. Because you make a problem for you when you send more documents than requested. I did that, and my PR process was suposed to take 12 months, but they pushed it to 26 months because they began asking irrelevant question about the “extra” documents I sent without anyone asking them for. They were like: “yeah, we need to verify with your renter and make sure you were at the address... Just look suspicious that you sent all this documents, so we picked your application to be verified on the information throughfully...”
So, the learning experience from that for me was:
“Just answer what is asked to you and send only the documents the application ask”
Another of my friends was more unlucky and they send his application back because he sent documents that were not requested for, and he lost the processing fee money that time....