H1B Multiple Transfer Bridge petition

Hi , I am looking your suggestion on below my scenario.

With Company A approved petition (validity 2020) I transferred to Company B and also Company C with Company A’s petition. Due to some reasons I started working with Company B receipt number recently. Both petitions are not yet approved. I want to join company C now. Is B petition called bridge petition? Can C petition be approved when B is in process?Can C petition can be approved if C is planning to apply for Consular processing when B petition is pending?