B. New religious ideas focused on people’s ability to improve themselves and others
Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
B.
Slaves came from Africa.
Religion teachings could be an answer but "B" would make more sense. Also, books came from printing presses... A "manufactured good."
Answer:
The Potsdam Conference is perhaps best known for President Truman's July 24, 1945 conversation with Stalin, during which time the President informed the Soviet leader that the United States had successfully detonated the first atomic bomb on July 16, 1945.
Torah - Judaism
Qu’ran - Islam
New Testament- Christianity