Respuesta :
Answer: D. the special religious duties of a muslim must observe.
Explanation:
One of the Five Pillars of Islam is the prayer - so it's an activity, not a place or an object or people. Because of this already we can reject the first three options: the first one describes a person, the second an object and the third a place.
The special religious duties of a muslim must observe.
The reason I know the answer is because I took the test.