Answer:
Duplicate these displays.
Explanation:
<u>A. Show only on 1</u> <em>displays only the first screen and disconnects the second one</em>
<u>B. Extend these displays</u> <em>displays two different outputs on the same computer</em>
<u>C. Show only on 2.</u> <em>displays only the second screen and disconnects the first one</em>
<u>D. Duplicate these displays.</u> <em>displays the same output for both screen</em>
Answer: The most important characteristic for the development of a civilization is the presence of advanced cities because they were centers of trade, which established economies and allowed for further development of the civilizations.
Explanation:
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So, you can be able to make a prediction and understand the cycle.
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