单选题 A main purpose of the passage is to

• (A) chronicle the evolution of Nahua survivalist strategies from the year 1521 onward
• (B) critically evaluate the means of Nahua survival on the basis of their efficacy
• (C) suggest that Nahua interacted with their conquerors to create new technologies
• (D) explore the rich cultural heritage endowed the Nahua by their tradition of survival
• (E) apply a general schema for cultural survival to the case of the Nahua