it wAs not until thE ACCiDEnt hAppEnED ______ .
A．whEn i BECAmE AwArE oF my FoolishnEss
B．whEn my FoolishnEss BECAmE oBvious
C．thAt DiD i rEAlizE my own Folly
D．thAt i BECAmE AwArE oF my own FoolishnEss