Military victories brought tributes to the Aztec empire and, concomitantly, made it ______, for Aztecs increasingly lived off the vanquished.

【正确答案】 C

【答案解析】 形容词词义辨析。for表示因果，空格应填入与live off(靠……生存)意思相近的词，live off表示一种关系，选项中parasitic(寄生的)符合要求。