It has opened new trade routes and we can see what they used for their roads and we can make ours better.
"<span>B). the fear among U.S. policy makers that if communism succeeded in Vietnam, it would sweep through the rest of the region" is correct. This theory was at the core of the idea of containment. </span>
The most logical answer sounds like D.
If it grows underwater then of course it's able to withstand water. <span />