Just like the Campeonato Brasileiro, groups from the reduced series, including B and C, can be promoted to the best division annually. In the case of Italy, only the major 3 groups in Serie B are promoted to Serie A (in Brazil, marketing comes about for four teams in Serie https://garrettwdehi.blogchaat.com/37805432/the-smart-trick-of-what-is-serie-a-that-nobody-is-discussing