question_answer

If\[A=[{{a}_{ij}}]\]is a4\[4\times 4\]matrix\[{{C}_{ij}}\]is the cofactor of the element\[{{a}_{ij}}\]in\[\left| A \right|\], then the expression\[{{a}_{11}}{{C}_{11}}+{{a}_{12}}{{C}_{12}}+{{a}_{13}}{{C}_{13}}+{{a}_{14}}{{C}_{14}}\]equal to

A)  0                            

B)         -1

C)  1                            

D)        \[\left| A \right|\]