<span>The correct answer is C.
Pei used modern materials like steel and reinforced concrete while
Niemeyer used traditional building materials like stone and brick
</span>
-Crayon manner: a manner of etching in which the ground is perforated with various needles, roulettes, or mattoirs to produce the effect of crayon or chalk drawing on print.
-Pastel manner: a method of color printing using multiple plates engraved in the crayon-manner.
-Chalk: a prepared natural stone or earth substance.
Answer:
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