Final answer:
The Aztecs climbed their pyramids during worship and performed human sacrifices at the top. While they made various offerings in their religious practices, there's less evidence to suggest direct offerings of gold and silver.
Step-by-step explanation:
The Aztecs had unique customs and practices in worshipping their deities within pyramid temples like the one in Chichen Itza. Primarily, they would climb these mighty structures as part of religious ceremonies, signifying choice (a). The pyramids symbolized mountains and were considered home to the gods, thus reaching their peak was like reaching the heavens. In addition, the Aztecs also performed human sacrifices (choice b) at these locations as a method of appeasing or thanking their gods. There is less historical evidence to suggest direct offerings of gold and silver as mentioned in choice (c), but various offerings would have occurred in the course of their religious practices.
Learn more about Aztec Worship