The answer is A hope this helps..
A. Astronomers predicted eclipses and developed a 365-day calendar.
(CORRECT)
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B. The city of Machu Picchu was probably a retreat for nobility.
(INCORRECT)
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C. Scribes painted books and kept records of taxes and territories conquered.
(INCORRECT)
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D. Emperors communicated using runners from the capital city of Cuzco.
(CORRECT)
Red coats, Lobster Backs... Can't think of any others sry
In the 1859 Dred Scott case, a Missouri jury ruled that only Scott, not his wife, should be free. That the Scotts should be granted their freedom.