The Answer is B
Personally I prefer manual voting over everything else. I have delegated to @steem-ua @smartsteem and @qurator small amounts of VESTS. Then I have set up my account to sell votes on @smartsteem and @minnowbooster when I have more than 99% VP remaining.
I'm already doing a lot of manual voting. So if bots disappear, I'd either do nothing t all or just delegate for DAPPs.
Little Bit on F
Joining curation trails is a great idea. I'm a mod of @akibasteem [Discord] (https://discord.gg/5PtVd2e) and we only started our account. So if I had to go on the passive route, I could just follow some curation trails and support certain communities I like.