D 由原文第八段"Being exposed to Islam was an important part of our trip. Visiting the mosques,especially the enormous Blue Mosque,was our first glimpse into how this major religion is practiced."可知,A项排除;由第九段"Although our son had studied Islam briefly, it is impossible to be prepared for every awkward question that might come up, such as during our visits to the Topkapi Sarayi, the Ottoman Sultans' palace."可知B项排除;由原文第四、五段,C项可排除。作者在文中并没有提及去shopping mall boutiques,故选D。