I've replied in the Outland UK thread but I'll post my reply here as well if it helps anyone else using the search function for similar questions

I am in a similar situation to yours except that I am the sponsor.
1)
When we submitted our application in May, I had no job offers or mortgage / rental agreements in Canada as we have no intention of quitting our jobs or selling our house until my husband gets his visa.
All I submitted as evidence that I am planning to return to Canada was a written timeline outlining ‘our reasonable plans' when we move to Canada and a letter signed by my parents confirming we could live with them while we look for employment and housing of our own. I was accepted as sponsor no problem.
I have heard of people printing off their internet browser history to show they have at been looking at job offers in Canada and looking for real estate listings.
Also on my sponsor form where it asks what date I plan to resume residency, I put a provisional date in, as I have no idea on the exact date I'll be returning to Canada, it all depends when we get my husband's visa. I have been advised by CIC that the date you put on the form is just that, a date. You don't have to be in Canada by the date you put on the form, but you will need to "land" in Canada with your spouse before the visa's expiry date (which is 1 year from the date of when the medical was done)
2)
As a Canadian sponsor living and working in the UK for the last 10 years, I could not and did not provide an Option C printout.
Instead, I included a photocopy of my ten P60's (2001-2011) and 12 monthly paystubs for last year (2010-2011). I also included a letter from my UK employer confirming my UK employment.
Hope this helps!
