It would be D. When you first take one out, you could either get an A or a Q. The next time around, if you had gotten A the first time you can still either get an A or a Q. Thus you optins would be A,A or A, Q. If you had gotten a Q the first time around, you still could have gotten an A or a Q, thus your results would either be Q,Q or Q,A. A sample space is a list of possible outcomes. So, yah. D is definitely the right answer.