whAt wErE thE villAgErs Doing whEn thE Explosion oCCurrED
A．thEy wErE CElEBrAting A FEstivAl.
B．thEy wErE Doing ExpErimEnts.
C．thEy wErE working in thE FACtory.
D．thEy wErE iDling in thE strEEt.