I would choose option B and use a really cheap <5€/m VPS with a sqlite database. Alternatively you could also use managed web hosting where you just upload you

I would choose option B and use a really cheap <5€/m VPS with a sqlite database. Alternatively you could also use managed web hosting where you just upload you CGI scripts. This will probably cost around 5€ and is a bit more limited but they usually give you access to a proper database like postgresql and you don't have to do as much server administration yourself.