It would be that "d. Muhammad was engaged in long-distance trade where he came into contact with monotheists" that likely would have influenced his acceptance of monotheism, since this allowed for him to gain new and challenging points of view.
There were many reasons for the Westward Expansion that conducted masses of Americans in the 19th century to the West. The most important were:
1) JOB OPPORTUNITIES.
2) MORE LAND.
3) MORE FARMING POSSIBILITIES.
4) FASTER TRANSPORTATION.
5) FREEDOM FOR RUNAWAY SLAVES.
The Dust Bowl, also known as the Dirty Thirties, was a period of severe dust storms that greatly damaged the ecology and agriculture of the US and Canadian prairies during the 1930s; severe drought and a failure to apply dryland farming methods to prevent wind erosion (the Aeolian processes) caused the phenomenon.
<span>B) Pre-war alliances were made in secret and elevated diplomatic tensions within those governments.
Or sometimes the fact that alliances were being made was announced publicly -- but the negotiations about the alliances were conducted behind closed doors. And often the terms of the alliances were kept secret, so that only the parties involved knew the full details. This contributed to an attitude of escalating nervousness and tension as the nations of Europe maneuvered for strength over against their perceived adversaries.
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C. Severely damaged the country's air, water, and soil.
