A Principal Architectural Feature of the Pompidou Center in Paris

A principal architectural feature of the Pompidou Center in Paris is that the:

A) walls of this building are made of automobile windshields.
B) dragonlike apperception of this building is created by steel-reinforced-concrete walls and a roof supported by steel cables.
C) innards of the building are allowed to become the principal architectural expression.
D) side-by-side gable roofs are supported by a thin steel frame.
E) material used for building is quilted aluminum with panels arranged in a grid and with sections strategically folded.