Yes, it is true that James Madison promised that the Bill of Rights would be added to the Constitution, since many people were afraid that without this Bill of Rights the Constitution would trample of people's individual liberties.
Wages, health, treatment of workers and farmers.
This eventually lead to the Russian Revolution since workers were unsatisfied with how they were treated and how they all lacked the amount of money to purchase basic necessities such as bread.
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Spanish missionaries were the first European settlers in Texas, founding San Antonio in 1718. Hostile natives and isolation from other Spanish colonies kept Texas sparsely populated until following the Revolutionary War and the War of Mexican Independence, when the newly established Mexican government began to allow settlers from the U.S. to claim land there. This led to a population explosion, but dramatically reduced the percentage of the population with Mexican heritage, causing friction with the government in Mexico City. After several smaller insurrections, the Texas Revolution broke out, and the state became an independent nation in 1835. However, the newly formed Texas Republic was unable to defend itself from further incursions by Mexican troops, and eventually negotiated with the U.S. to join the union in 1845.
The correct answer here is the third option.
It is important to note that US has largely been an isolationist country since its creation and thus it was hard for an isolationist country to get involved in what many Americans saw as the European war. So in 1917 they created the Division of Pictorial Publicity in order to promote the war effort.