Much like the Campeonato Brasileiro, teams while in the decrease series, including B and C, may be promoted to the highest division each year. In the situation of Italy, only the leading 3 teams in Serie B are promoted to Serie A (in Brazil, promotion happens for 4 teams in https://soi-k-o-nh-c-i55431.bcbloggers.com/36632255/facts-about-what-is-serie-a-revealed