Can someone please explain this AP CSA practice test question? The review book's explanation still doesnt make sense to me. (please explain throughly, I actually know NOTHING) (question 30 and ignore my marks)i dont understand the what the if statement does

8. How many times will line 12 be executed? (A) 6 times (iB) 12 times (C) 15 times (D) 16 times (E) 20 times 30. What will be the final output after the code executes? (A) [21,8,6,2,1] (B) {6,21,2,8,1] (C) [6,2,8,21,1] (D) [2,6,8,21,1] (E) [1,2,6,8,21]