Answer:
The factors that led to the Berlin Blockade were a combination of economic and ideological conflicts. On the one hand, the existing and growing rivalry between the Soviet Union and the democratic allies (America, Britain and France) in ideological terms, with the rivalry between communism and capitalism, fueled a constant state of tension and dispute between the two Germanies. To this was added the recent monetary reform carried out in West Berlin, which accompanied the adoption of the Mark in West Germany. This currency was much stronger than the East German currency, so the Soviet authorities feared that it might produce a kind of de facto economic control by the West over East Germany.
These factors made the Soviet authorities decide to close its borders with West Germany, practically closing West Berlin and economically isolating it from the rest of the world, in an event that is known as the Berlin Blockade.
Soviet Union was the first country
<u>"confirming that it is not an online source" </u>is wrong. The problem is not the fact the source is online, but if it's credible.
<u>"determining whether or not it is well-known" </u>well-known sources might still be wrong. Being known does not make something true.
<u>"d. determining whether it is a secondary source" </u>again, it has nothing at all to do with the validity of the source.
So the answer is:
b. checking its conclusions against other sources
The best way is to check the source and compare to different ones that talk about the same subject. Comparing different conclusions of different authors and seeing different points of view about the same thing is often the best way.
The answer is wheat. Wheat was one of the most exported products in the US because of its abundance. North America owns the largest fertile lands in the world. They make up 50 percent of the kernel production in the world. Wheat was being exported during the 19th century because most countries like Russia, Great Britain can not grow such product because of its climate and geographical location.
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The impact that the Homestead Act and the Bessemer process had on the development of American railroads was of the utmost importance to the history of Railroads in the United States.
The Homestead Act was enacted in 1982, during the American Civil War. This act passed by Congress offered 160 acres of land to people who wanted to settle the land and make it work to produce.
The Bessemer process was the creation of Henry Bessemer to produce inexpensive steel, using a process to get steel from molten pig iron. This process allowed the mass production of the steel needed to construct railroads across the North American territory.
Both, the Homestead Act and the Bessemer process served to impulse and support the railroad system and the transportation of goods and people through the American territory and the construction of the Transcontinental Railroad that connected the East coast of the US with the Pacific coast.
