Which statement best describes the acropolis?

'acropolis' is any citadel or complex built on a high hill. The name derives from the Greek akro, high or extreme/extremity or edge, and polis, city, translated as 'high city', 'city on the edge' or 'city in the air', the most famous being the Acropolis of Athens, Greece, built in the 5th century BCE.

Explanation:

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president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".