D. the emergence of credit and an increase in manufacturing output
Christianity, decadence, the metal lead in the water supply, monetary trouble, and military problems caused the fall of rome.
Answer:
He is known for his traveling and going on excursions called the Rihla. His journeys lasted for a period of almost thirty years, which influenced Islam.
Sparta's policies were the most harsh and strict so it's D. Sparta
During this time, the Russian Tsar had practically no contact with the "common people", which is one of the reasons why there was a revolution to overthrow him and his regime in 1917.
