 What is the author's main purpose in this text?
Probably, although the evidence suggests that Elizabeth had developed a head for stratagems earlier in life (her position had been precarious since the beheading of her mother) and came to the throne with few girlish illusions about How Things Work in a barbarous state. Gradually expunging all empathy from her moist, pink eyes and permitting her visage to ossify, she gives this carnival of carnage an awe-inspiring center. Now the story is told by an omniscient narrator, now a TV reporter, now a participant.
 to inform us of the pros and cons of each movie
 to compare the abilities of three directors  to persuade us to pay attention to the hidden meaning in the films  to compare the queenly characteristics of the three films  to inform us of the pros and cons of each movie