A. is the correct answer.
Actually, you've got two (2) incomplete sentences that need best word or phrase to be complete: "<em>Caesar Augustus made sure that the central government controlled </em><u><em>tax collection</em></u><em>.</em>" "<em>Engineers built the </em><u><em>Field of Mars</em></u><em>, which had government offices and statues.</em>"
Thus, the correct answers are "tax collection" and "Field of Mars".
The third sentence is already complete: <em>"A </em><em>mail service</em><em> was created to improve communication." </em>
Also, the last sentence: <em>"Caesar Augustus ordered the construction of </em><em>aqueducts</em><em>, which improved water supplies and provided water for crops." </em>is also complete.
These matters fall under the topic "Roman Empire: At Its Height," and they primarily concern Caesar Augustus.
Learn about Caesar Augustus's main reason for ordering the construction and renovation of buildings in Rome: brainly.com/question/15641074
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The Populists demanded an increase in the circulating currency which was to be achieved by the unlimited coinage of silver, government ownership of the railroads to prevent monopolies, the direct election of U.S. senators, and other measures designed to strengthen political democracy and give the farmers economic parity with the larger business powerhouse.
Hope that helped!
War of the Austrian Succession. the war (1740–48) in which Austria, England, and the Netherlands contradicted Prussia, France, and Spain over the choice of rulers for regions inside the Austrian Empire.
I hope the answer will help you.