All thE invEstigAtions ______ BEForE thE DEADlinE, thE stAFF DECiDED to hAvE A pArty As A CElEBrAtion.
A．BEEn FulFillED
B．hAD BEEn FulFillED
C．wErE FulFillED
D．hAving BEEn FulFillED