This topic examines the main contents of Athenian democracy and related knowledge of its significance.
In Athens, all male citizens over the age of 20 have the right to attend the citizens' assembly, which is the highest authority. At the citizens' assembly, citizens can speak freely or have a heated debate, discuss city-state affairs with each other, and finally make a resolution according to the principle that the minority is subordinate to the majority. Therefore, the important procedure of Athens citizens' assembly is debate. So choose B.