b) self employed
c) self employed but new business
d) employed but changed jobs and tax is in new job.
Rough and ready
a) in BR
b) in BR
c) not in BR
d) not in BR
But that is just that rough and ready - it will depend on a few other issues.
The OR's technical manual has a bunch about this but I can't post a link right now
Remember, posts here are just the informed views of people with similar experiences to your own or with some basic understanding of the issues.
If it's important, then there's no substitute - seek professional advice!