Why do we begin our studies of media with the invention of the printing press? A. Because it led to a newfound interest in curre
nt events b. Because it made immediately possible the mass production of newspapers c. Because it was the first tool of mass communication that made the exchange of information possible
The Vietcong set up checkpoints around the nation, so that would've definitely been a literal and figurative roadblock to any refugees. Hope this helped.