Marcel Duchamp's Nude Descending a Staircase, No. 2 was shocking because of the nudity it contained.

Nineteenth-century industrialization led to the development of __________ as a building material, and it was the first material to allow the erection of tall buildings with relatively slender walls

a. cast iron b. steel c. reinforced concrete d. veneer e. treated wood

Li Yu was the only important playwright of note during the Ming Dynasty.

Answer the following statement true (T) or false (F)