What statement about the interior and exterior of the pyramid entrance at the louvre museum by i. m. pei and metropolitan cathedral by oscar niemeyer is true?

a.
pei used fluid curves while niemeyer used straight-edged geometric shapes and forms in his structure.

b.
pei used complex shapes and forms while niemeyer used simplified shapes and forms in his structure.

c.
pei used modern materials like steel and reinforced concrete while niemeyer used traditional building materials like stone and brick.

d.
pei used transparent glass to frame the views outside while niemeyer used stained glass to create a heavenly light inside.