C. Expansionary fiscal policy (don’t know if I’m right)
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.
The correct option is "D", "<span> The Abbasid caliphate was not affected by conflicts within the Muslim community".
In fact there is no Muslim reign which was not affected by </span><span>conflicts within the Muslim community after the martyrdom of the third Khalifa of Islam Uthman (ra). When he was attacked he made a prophecy that if today you kill me, the Muslims until the end of time will not be united, which to date is standing as witness.</span>
