Us because if you say we in that sentence it just doesn't make sense
The correct answers are below.
Question 16: The author most likely wrote this passage to tell about an important historic site. The answer here is B.
Question 17: The purpose of this passage is to describe a historic site and its builders. The answer here is also B.
Question 18: The primary point of view of the author is that of a student of the past speaking in our time. The author is not writing as a tribal member or European settler. Therefore, the answer here is also B.
The difference between denotation and connotation is that denotation is a word's literal meaning and connotation is the attitudes associated with a word. The correct answer is A.