Some americans thought that the united states could have won in vietnam if the north vietnamese would have fought harder if the united states had not lost at dien bien phu if there had been more naval battles with the vietcong if the military had employed its power quickly and without limit

Explanation:

First of all, this the answer that makes sense, because back then diplomacy was important and that changed the orders from the White House, because otherwise could be seen as a massacre executed by American Forces. So, they needed to limit power of the armies in that place.

d. it spread christianity. i just took the test and got it right.