The best answer to go with is b
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).
Cotton was popular item back then and it was all about supply and demand. There wasnt enough cotton to supply everyone and so the cotton price rose.
Through crystallization of melted materials, crystallization of minerals dissolved in water, and crystallization of minerals when solutions evaporate.
