How did railroad expansion make natural resources more available in the US?
by increasing the amount of natural resource deposits
by making it possible for natural resources to be transported to different cities and towns
by using natural resources to build tracks and train equipment
by transporting people to cities and towns where they could purchase natural resources

Respuesta :

One of the main ways in which railroad expansion made natural resources more available in the US was "by making it possible for natural resources to be transported to different cities and towns," since the rail lines greatly increased the speed and quality of the transfer. 

Answer:

b

Explanation:

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