Let's see...Bill Clinton parsed the word "is" --- and now you're parsing the supposed "distinction" between at or in.
But thank you for chiming up. 'Cause you made my point, which is, that per Mormon apologists, if a Mormon (or anyone) taking this survey answered "Jerusalem" -- one of the choices on this multiple-choice survey -- then they would be "correct."
I mean, what? They did a survey where answering either of two cities was the "correct" answer per your apologetic? So, yes or no, answering either of two answers was "correct?"
My guess is that the pollsters did not accept Jerusalem as the birthplace of Jesus, when Bethlehem is obviously the more precise answer.
Assuming that to be so, it would appear that the majority of the Mormons surveyed were not confused about the birthplace of Jesus. If they are not confused, why should you be?