Answer:
Correct answer is Many western Europeans perceived the Ottoman Empire to be a threat.
Explanation:
First option is not correct as it was named after its founder Osman.
It didn't exist for six decades, but for six centuries.
It wasn't ruled by an emperor, but by a sultan. The most famous one was Suleiman The Great.
European countries led many wars against the Ottomans trying to prevent them from spreading. Among them the most famous one was Great Turkish War.
The French invasion of Vietnam was very gradual and it was going on step by step for quite some time. Initially, France was sending missionaries in Vietnam in order to spread the religion and culture of France in order to set basis for further actions. The missionaries indeed had very large influence, but came to a big resistance by the local courtesans who had feared for their status in the society if the French missionaries continued their work.
That led to some tensions and an attempt to banish the missionaries, but the French intervened with their military and stopped that. Since that initial military conflict, the French started to invade Vietnam. It was a step by step invasion, where the French would have invaded a city, than another city, maybe lose some afterwards, but than return and reclaim it, and that went on for some time until the French managed to totally outmaneuver the Vietnamese and gain control over their territory.
In 1898, the United States assisted in war to protect its citizens and businesses in Cuba. This war was known as the Spanish-American War. The United States declared war on Spain after the U.S. warship, the Maine, exploded and sank on February 15, 1898 while visiting Havana, Cuba.
The answer is majority rule
I am sure that's correct, Davis being a Democrat was strong on states rights.