<em>D. </em><span><em>Rome could not grow enough food and maintain a large enough army to fend off barbarian tribes.</em>
<em>It is true Rome could not grow enough food and maintain a large army because of the barbarian tribes. Non of theses answers would be true but D.</em>
<em>I hope this truly did help!</em></span>
Basically the reason why Vietnam won because the Vietnamese wanted to win more than the Americans did. There were a couple of reasons for this. First, the Americans were an invading force, and the Vietnamese were fighting on their own soil. Second, the Americans were not willing to make an all-out commitment to win.
I would say oregon but im not sure
