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All of the following developments helped make the cattle business profitable except:

A.
barbed-wire fences

B.
new railroads and refrigerated cars.

C.
growing cities in the East

D.
cattle trails

Respuesta :

All of the following developments helped make the cattle business profitable except "cattle trails" since these did nothing to make the selling or herding of cattle more effective. 

All except cattle trails, as nothing else would ever have a connection to make sense.

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