How did Andrew Caregie contribute to the industrial development of the United States? O He supported labor unions and raised his workers' wages.
O He introduced pipelines instead of railroad cars to transport oil.
O He adopted new techniques to mass-produce steel at lower cost.
He financed the first transcontinental railroad, allowing rail travel coast to coast.

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.

a overment ran by a signle strong leader is also known as multiple things depending on the country and the coutnrys belifs and relgions

president,dictator