What group of people were the most responsible for trade between the 7th and 14th centuries?

what system was created because of the decline in native population in south america?

25. twelve tables

26. having important positions chosen by lot

the crusaders are identified in the painting;

c. by the red crosses on their backs

civil disobedience, refusal to obey the demands or commands of a government or occupying power, without resorting to violence or active measures of opposition

i believe the answer is a