can someone please answer this? If you do i will crown you as brainliest!

(9t-4)(-9t-4)
Multiply each term by each term then combine like terms:
9t x -9t = -81t^2
9t x -4 = -36t
-4 x -9t = 36t
-4 x -4 = 16
-81t^2 - 36t + 36t + 16
Combine like terms:
-81t^2 + 16
The answer is the second choice.