Answer:
E. rib vault; clerestory
Explanation:
In the interior of St. Étienne the process of lightening the walls has been developed and its disappearance has almost been achieved.
The openings of the upper gallery have the same width as the arcades of the ground floor and also the area of the clerestory is open by the rows of arcades, with which the wall is slightly pointed.
I think is the first one will be better
