B. Moctezuma demanded tributes and victimized his people.
Explanation:
From the passage, we discover that his people resented to his demands for tribute and victims of the religious sacrifices. Such resentment from his people weakened his conquest.
When any people are against their rulers, it is difficult for such ruler to enjoy freedom and exercise his authority. I believe this played out when the people began resenting Moctezuma.
He demanded tributes and victimized the people but that worked against him and made him a prisoner in his own palace.
