The American Revolution was principally caused by colonial opposition to British attempts to impose greater control over the colonies and to make them repay the crown for its defense of them during the French and Indian War (1754–63).
Answer: D.
Explanation: The warlord era contributed to the start of the Chinese Civil War because it frustrated the youth and motivated them to embrace the ideas of communism and nationalism. The split between these ideologies as well as the turmoil wrought by the warlords pushed the country to a Civil War.
I think in the Italian Renaissance it would be to unite families.
This allowed different and new ideas to be spread both easily and quickly. Scientific discoveries, philosophers ideas, and plans for inventions could be mass produced and distributed through the world