Not sure if it helps explain the confusion or not, but I initially thought that top 1000 was an incorrect answer becasue it was the one I selected and I got the question wrong.

What I failed to notice was that the answer included checkboxes and not option buttons. Thus, I assumed that "top 1000" was not correct - found the reason why (Set Rowcount 100 GO Select top 1000 * from bigtable only gives you 100 so no guarantee). In fact, it is a correct answer and to be fully correct , you have to also choose the "top 10 percent" answer. Sometimes it helps to add the words, "choose all correct answers" to the question.