Which statements about characteristics of the aztec's civilization are true?
choose all answers that are correct.
a. stone masons fitted gigantic blocks of stone without using mortar
b. settled in the valley of mexico around the year 1250
c. built a high mountain city, probably as a retreat for nobility
d. found a permanent home on an island where an eagle tore apart a serpent

Which statement best describes a significant cause of world war ii? o a. the economic boom that followed world war i allowed countries to build up huge militaries. o b. the treaty of versailles, which ended world war i, left lasting resentments in many countries. o c. the rise of imperial states in asia caused european powers to unite for their common defense. o d. the league of nations encouraged european states to form secret military alliances.