Which of the following statements is the most accurate depiction of the Aztec Empire?

Which of the following statements is the most accurate depiction of the Aztec Empire?
 
  a. It was a highly centralized, tightly administered monarchy developed through military conquest.
  b. It was a confederation of localities linked by a feudal allegiance system in which a central ruler controlled an empire developed through military conquest.
  c. It was a highly centralized maritime society that had evolved from a foundation of intense religious piety.
  d. It was followed by the Mayan civilization.
  e. Human sacrifice was abolished by Montezuma.