The answer is cultures. Unmistakable provincial societies created among the people groups of North America in the vicinity of 10,000 and 2,500 years prior. Over hundreds of years unmistakable gatherings built up their own dialects, social associations, religious convictions, and practices, governments.
Your answer would be A because the Emancipation Proclamation only freed the slaves in the south until the South decided to come back to the US.
This is true. The British army was much larger and much more developed, but the colonial army managed to win by winning the support of the people and of foreigners. They were helped by British enemies such as France who was willing to give not only weapons and money, but also its navy and its generals with their war expertise.