Salutations!
Shah Jahan constructed the Taj Mahal to serve as a _______ for his wife.
Shah Jahan constructed the Taj Mahal to serve as a mausoleum for his wife. A mausoleum is a tomb or group of tombs. Shah Jahan's wife Mumtaz Mahal was buried there.
Thus, your answer is option D.
Hope I helped (:
Have a great day!
