Answer:
A. the Aztec capital was rebuilt as a Spanish capital.
Step-by-step explanation:
Spain's intention to attacked the Aztec was to take control of the resources that exist within their region (most notably Gold and different varieties of agricultural product)
After the Aztec is defeated, Spain need to built a base in that region that will serve as a control post during the resource extraction process. This is why the Aztec capital was rebuilt as a Spanish capital. They implemented some sort of government for easier communication with the government in Spain and brought in the technologies necessary for the resource extraction.