All oF thE Following sEntEnCEs ExprEss oBligAtionExCEpt ______.
A、EvEry CompEtitor shoulD hAvE his own First AiD kit
B、you must hAvE sEEn how struCk hE wAs with hEr
C、ACtors must BE prEpArED to CrEAtE thEir own work
D、i think you hAvE to stAnD By whAt you BEliEvE