Question

how did new technologies contribute to the rapid growth of factories in american cities? (1 point)
steam power reduced manufacturing costs
electric lights enabled 24 - hour factory operations
machine tools increased worker productivity
mechanical systems replaced manual labor

Explanation:

All options describe valid contributions of new technologies to factory growth, but the question asks for a single correct answer. However, in standard historical contexts of American industrialization, machine tools directly enhanced worker output, driving expansion. (Note: If multiple correct answers were allowed, all could apply, but for a single choice, machine tools' productivity boost is a core driver.)

Answer:

C. Machine tools increased worker productivity