Evaluate the determinant by using diagonals. asap

a.16
c.32
b. –16
d.36

Not sure what you mean by "using diagonals", but I'll take a guess and say it refers to the trick where you copy the matrix like this,



Then the determinant is computed by taking the leftmost three left-to-right diagonals, multiplying elements on the same diagonal together, then adding the three products together:



Next, take the rightmost right-to-left diagonals, doing the same as before:



The determinant is then the difference of these two, so the answer would be 16 (A).