Sing a cofactor expansion across the first row. Also compute the determinant by a cofactor expansion down the second column. StartAbsoluteValue Start 3 By 3 Matrix 1st Row 1st Column 6 2nd Column negative 6 3rd Column 9 2nd Row 1st Column 9 2nd Column 3 3rd Column 6 3rd Row 1st Column 3 2nd Column 9 3rd Column negative 3 EndMatrix EndAbsoluteValueWrite the expression for the determinant using a cofactor expansion across the first row. Choose the correct answer below. A.Using this expansion, the determinant is (6)(negative 63)plus(negative 6)(negative 45)plus(9)(72).B. Using this expansion, the determinant is (6)(45)plus(negative 6)(99)plus(9)(90).C. Using this expansion, the determinant is (6)(negative 63)minus(negative 6)(negative 45)plus(9)(72).