Which of the following was an effect of nativism in the us in the 1920

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

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories