Much like the Campeonato Brasileiro, teams inside the lower series, such as B and C, is often promoted to the best division every year. In the case of Italy, only the top three teams in Serie B are promoted to Serie A (in Brazil, promotion comes about for four teams https://keo-nha-cai-527926.ltfblog.com/36342165/detailed-notes-on-what-is-serie-a