Both concering certain areas of the us
I think it is B because the Columbian exchange was bringing what they already had in the old world to the New world and what the New world had that the old world didn’t they brought they brought to the old world if that makes sense.
A Maya city from the Classic Period usually consisted of a series of stepped platforms topped by masonry structures, ranging from great temple-pyramids and palaces to individual house mounds. These structures were in turn arranged around broad plazas or courtyards.
