The point that is considered the starting point of the fall of Tang Dynasty is during Emperor Mu Zong reign, around the year of 821-824. He is known for his high-spending, alcoholics habits and as neglectful emperor.
The correct answer is The fall of the Tang Dynasty began with lack of leadership.
He finds Eugene on a bus. The only seat available is next to them.
In the late 1800s, the growth of the railroad led to Midwestern cities like Minneapolis and Cleveland becoming industrial centers. The Midwest soon become a leading center of industry in the late 1800s. With immigrants coming in, half of them went to the Midwest to look for a job in the factories.
"Containment" is the answer to your question.
Cactus Hill site has human remains that have been dated to around 20,000 years ago. Given its location in Virginia shows that human beings had reached America earlier than this. This contradicts the theory that postulates humans came to America from Siberia through the modern day Bring Strait. The theory asserts that at the end of the Ice age humans were able to cross to America through the Beringia land bridge and other means such as canoes and rafts around 10,000 years ago.