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The answer is A, Crystallized Intelligence.
The answer is: [C]: a large supply of cheap labor.
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Note: You meant to write:
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"Which factor HAD the greatest positive effect on the late 19th century American industrialization?"
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Answer: C) bipolar 1
Explanation: Bipolar disorder are usually characterized by episodes of psychological or emotional imbalance or disorder. With individuals suffering from these disorder usually witnessing a series of maniac (high or elated mood) and depressive (low) mood conditions. When an individual experiences a full maniac, that is an usually elated or very happy feeling then followed by a depressive episode, the n such individual is said to be suffering from bipolar 1. This is different from bipolar patients who experiences full depressive mood followed by moments of hypomaniac which is lesser in severity than the full maniac episode.