Answer:
C. were different for the Aztecs than they are today.
Step-by-step explanation:
I would need the full context of the story to find the actual main idea, but based on these answer choices I'm fairly confident it's the third option.
Winning and losing "were not very important to the Aztecs" does not seem to align with the picture. If the winning team won everyone's clothing, this is a big deal.
Winning and losing "have not changed much over time" does not seem likely, as culture is constantly fluctuating.
Winning and losing "were different for the Aztecs than they are today" seems like the best answer. The historic beliefs of Aztecs value many different ideas and practices than what we do now.