Answer:
because he wrote the majority of the documeny, also it was an important document that declared independence from Britain, marking the start of the Revolutionary War
I just did this and got a 90% I'm pretty sure its B
I think it should be the last answer!
B) Preventing the spread of communism
The role of the united state in Vietnam war began after the world warII. US mission was to restrict the communist domination that was present in Vietnam government, this was because communism could easily spread to the Neighbouring countries which would result to a change in the balance of power throughout Southeast Asia.