Answer: all of the above
Increased globalization has been possible, because (in the words of New York Times journalist, Thomas Friedman) the world has become flatter. Thus, due to technological advances and reduction of barriers companies have increasingly become
Yes, I believe that's true. They spread their believes and traditions with them.
The expanding of the muslim Empire in the years following the Prophet Muhammad's death led to the creation of the caliphates, occupying a vast geographical area and conversion to Islam was boosted by missionary activities particularly those of Imams, who easily intermingled with local populace to propagate the religious teachings.
FBI, Border Patrol, CIA, Homeland Security
The crop that allowed the early English colony of Virginia become profitable and survive was tobacco.