Answer:
Option: c. Sewer
Explanation:
Sewer plays a key role in collecting wastewater from human populations more effectively than in the past. Before, the emergence of cities, there was no proper procedure to collect the wastewater in America, which ultimately affected the environment and underground water. As cities began to take shape in America with a larger population, the sewage system came in the late 1850s in Chicago and Brooklyn.
<span>The contentious issue of voting procedure</span>
Answer:
The Greensboro Four were four young black men who consisted of Ezell Blair Jr., David Richmond, Franklin McCain, and Joseph McNeil
South Carolina and other states such as Virginia ant Texas seceded from the Union and created the Confederacy.