Which three statements are true about common roles?

A、Acommonrolecanbegrantedonlytoacommonuser。
B、Onlysystemprivilegescanbegrantedtoacommonroleinacontainerdatabase(CDB)。
C、Objectprivilegescanbegrantedtoacommonroleinapluggabledatabase(PDB)。
D、AcommonuserthatisgrantedacommonrolecangranttheroletoothercommonandlocalusersinaPDB。
E、Acommonrolecannotbecreatedbyalocaluser。