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According to this excerpt, what was an underlying cause of increased steam elevator production?

A)construction of tall buildings
B)the need to move supplies in mills
C)freight service operations
D)commercial advantages

Respuesta :

mommysgirls68

Answer:

a) construction of tall buildings

Explanation:

Since the buildings during this time period were being built bigger and bigger there was more demand for elevators so people could get from floor to floor. Hope this helped :)

ciannabissonette0712

Answer:

D) commercial advantages

Explanation: