Answer:
B. Petroleum
Explanation:
Silver is second.
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The Battle of Antietam was considered a turning point in the Civil War because this was the first major Union victory in the East.
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Economists divide the factors of production into four categories: land,labor, capital, and entrepreneurship. The first factor of production is land, but this includes any natural resource used to produce goods and services. This includes not just land, but anything that comes from the land