People began to develop networks of urban settlements when the rise of agriculture and trade allowed people to have surplusfood and economic stability
One could make the argument for any one of the aforementioned events. However, I would have to argue that the Louisiana Purchase was the most significant for a few different reasons:
1) Jefferson used the concept of implied powers in order to buy this land from France. Nowhere in the US Constitution does it say that presidents can buy land from foreign countries. However, Jefferson argues that this power can be implied. Due to Jefferson's actions, several presidents after him will follow suit and buy territories from other countries.
2) It doubled the size of the United States.
3) It initiated the US's policy of Manifest Destiny. This concept that America should control all land from the Atlantic to Pacific Ocean was one that was introduced in the early 19th century. The first big land annexation of this time was the Louisiana territory (1803). After this purchase, the US would continue to grow in size thanks to buying land from other countries and war.
In the year 1869, the first transcontinental railroad was finished. The correct option among all the options given in the question is option "B". The construction of
the railroad started in the year 1863 and finished in the year 1869. It was a
1907 mile continuous railroad that connected Pacific coast of San Francisco Bay
with the Eastern U. S. rail network. The railroad was actually built by three
private companies of the United States. The railroad was opened for traffic on
10th<span> of May in the year 1869.</span>
<span>The Constitution is a flexible document that should change as the country changes. Hope this helps!</span>
Answer:
They had never seen these diseases so their immune system couldn't handle them. So, lots of people died and the population went down.
