A. Where could your luggage be found?
B. Where can your luggage be found?
C. Where will your luggage be found?
D. Can you find your luggage somewhere?
The given sentence contains one of Model verb (Model Verb = will, shall, can, may, might, could, might, must, would). It is in active voice.
Rule :
Where + Model verb + be + V3 + Optional Objects + ?
