Megatall
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The world’s tallest structure is the Burj Khalifa. It is located in Dubai, The United Arab Emirates. It stands an amazing 829.8 meters (or 2,722 feet) tall. Given its remarkable height, the Burj Khalifa has been placed into a new category of skyscraper called a "megatall skyscraper". The building also has 163 floors. To reach these floors, it has 57 elevators and 8 escalators. It also has over 24,000 windows. The windows at the very top of the building are washed by robots!
In the final sentence of this passage, we read that "The windows at the very top of the building are washed by robots!" The purpose of this sentence is to
A. illustrate
B. prove
C. conclude
D. introduce
E. persuade
E. the mailman has three dogs