The fact__we haven't confirmed__we have run out of the food might not be truwA.that,\B.\,thatC.which,\D.\,whichwhy we choose

The fact__we haven't confirmed__we have run out of the food might not be truwA.that,\B.\,thatC.which,\D.\,whichwhy we choose
The fact__we haven't confirmed__we have run out of the food might not be truw
A.that,\
B.\,that
C.which,\
D.\,which
why we choose

The fact__we haven't confirmed__we have run out of the food might not be truwA.that,\B.\,thatC.which,\D.\,whichwhy we choose
b
前面是定语从句 可以省略连接代词
后面的是主语从句 不可以省略