The answer for this is A.
The government sued the northern securities railroad trust because it thought the trust was an illegal monopoly that was preying on citizens.
The state and Local governments responded positively to the expansion of railroads.
These governments used the presence of the railroads in their regions as a way to promote trade and transportation in the areas. They helped by granting lands to railroad companies.
The railroads contributed to development by bringing in much settlers to the area and also opening it up to trade.
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