In contrast to medieval art, paintings during the renaissance were
a. about religious events and concerns
c. mostly commissioned by the church
b. flat and sometimes without background at all
d. realistic and often about everyday life

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof