Honestly they (Colonial Americans) didn't have enough soldiers but all i know is that they won the war by using different military tactics.
Like for example....
Ambush techniques (which they borrowed from the Native Americans)
and they didn't use the line of fire tactic or is it firing line?
and they knew they ways of the land that they were on compared to the British soldiers who only knew where nearest pub was in London.
That's all I know!
Its probably D because the also got help from some mercenaries and other war generals from Europe.