TOEFL Reading: ETS-TOEFL阅读机经 - N288FM57FX9A554NL$

In paragraph 2, why does the author discuss the Pyramid of the Sun at Teotihuacan? A. To introduce the discussion of a specific style of Mesoamerican art B. To illustrate the importance of an accidental discovery C. To emphasize the necessity of systematic study D. To argue against the use of modern equipment in archaeology