The correct answer is C. Texas left the decision of slavery to popular sovereignty, which is essentially popular vote.
The coalition forces that fought on the side of Kuwait consisted of Kuwait forces, the United States forces, the United Kingdom forces, the French forces, and the army of Saudi Arabia. It was odd to have this coalition for many people because of the support of Saudi Arabia, as well as the support that Europeans gave to the Kuwait forces.
The cotton gin changed the textile industry by making cotton far easier to sort, greatly increasing the output of available cotton and therefore causing the price to drop. The cotton gin works by separating the cotton fluff that will be made into fabric from seeds and dirt. Previously, picking these seeds out of cotton took a great deal of time and energy, but the invention of the cotton gin in 1794 sped up the process, allowing farms to produce far more cotton and increasing the amount of cotton available for making clothing.