There is no Scenario B as that gives you the option to fail which you definately will not do on LL. Scenario A will definately work and you'll be there quicker than you know it.
My advice to you would be :-
1. Believe in yourself
2. Failure is not an option / think positive thoughts
3. Do not cheat 100% - stick to the plan (it does work)
4. Give yourself lots of other treats (non food) regularly
5. Drink your water - you'll feel better for it.
6. Keep going forward and don't look back.
If ever there was a diet worth doing it is LL. My first thoughts in my Week 1 was failure, initial thoughts were I would do this for a month at tops, but 4 weeks into it I was still on the Programme a couple of stone lighter and my thoughts changed to a fear that it was possible I could do this it was very bizarre.
I have just finished Week 14 (last week of Foundation and Ive lost 60lbs. I would have been more than happy to have lost my 3 stone like the programme said I would do, but the fact Ive lost a further stone is a bonus. Ive moved onto development class now and I start next Thursday. I have about another 2.5 stone to shift before I start management.
It doesn't seem 2 minutes since I started on the programme and I can honestly say Ive enjoyed every minute (in a strange sort of way).
Keep Smiling.