This question is very broad, try to be more specific.
Answer: 3rd century BC
Explanation: Hellenistic astronomy established the roughly spherical shape of Earth as a physical fact and calculated the Earth's circumference.
The conditions that created a favorable business climate during the late 1800s included the following:
1. There was no government interference. Businesses were self-regulated.
2. Laissez fair capitalism thrived in the face of free competition.
3. Businesses created monopolies to limit or prevent competition.
4. Businesses determined the prices of their products and services and wages paid to employees.
5. Transportation and other technological innovations facilitated business activities.
Thus, these conditions helped businesses to develop faster during the late 1800s, unlike later years.
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Within the span of a hundred years, in the seventeenth and early eighteenth centuries, a tide of emigration -one of the great folk wanderings of history-swept from Europe to America. This movement, impelled by powerful and diverse motivations, built a nation out of a wilderness and, by its nature, shaped the character and destiny of an uncharted continent.
The correct answer to this open question is the following.
The role did the Oregon issue played in the 1844 presidential election was the following.
The Democratic party insisted that the United States had a genuine claim to demand Oregon as part of the US. At that time, the British controlled Oregon. This issue met the other territorial expansion demand: the annexation of Texas to the Union. That is why the Democratic candidate James Polk included in his platform the expansionist idea that later became the Manifested Destiny, the right of the US to expand and grow. Polk won the presidency by defeating Henry Clay, who opposed the annexation of Texas.