The only answer that makes any sense is C. The British Empire was the sole enemy of the French, fighting them and winning in the Seven Years War. While I am completely unaware of what campaign you are referencing, General Burgoyne partook in many over his years as a British officer, I am certain alliance with the French and splitting New York and Canada were not one of them.
Answer:
they could make more money that way so A
Explanation:
They brought settlers who formed colonies. They established the boarderlands that started the formation of America.