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.
I believe that it would be B that there are no single topic sentence
Answer:
The ocean is deep, it is dark, and it is mysterious.
Explanation:
just take away three periods thenput it in sentence break it up and tell them
this, and, this, and that.