In 1900, 40% of the US labor force worked in agriculture. A hundred years later, in 2000, only 2% worked in agriculture. What is an important reason for this change?

Improved machinery, fertilizers, and other technology allowed fewer agricultural workers to produce more food. As farms became more productive, the country needed a much smaller share of its labor force to meet its needs. The best answer is C: improved technology meant that the country needed fewer farmers.

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