请选择ABCD,e6V.l4H/k.h)s0z A fire can happen _______ you're sleeping at home.(Y0F9]2q)\*@
A. where(Y0F9]2q)\*@
B. when(Y0F9]2q)\*@
C. who(Y0F9]2q)\*@
D. why(Y0F9]2q)\*@