I put c on mine and it wasnt right and because money was far from an issue, i would say A.
Without the use of machinery many Americans will be employed to do various jobs. Their unemployment rate during that time will decrease. Another consideration is that there is a need for expertise in handling heavy machinery. One must be learned enough not only to drive heavy machinery but also to operate it and maintain its good condition.
A. Transcontinental railroad
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Velocity= Distance/time or V=D/T. there is a triangle to help remember this
D
