I believe the answer is: To control trade along the Mississippi River.
By controlling the Mississippi river, Thomas Jefferson believe that they could eliminate british influence in products distribution to different states. He counted that the amount of products transported from this river could accounted to around 500 million tons of shipped goods per year.
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The correct option is B.
The second industrial revolution occurred between 1870 and 1914. During this period, there was massive advancement in technology and in factories and this made it possible for manufacturers to produce a lot of goods en mass. The industrial revolution started in Britain and rapidly spread to Europe and North America an then to the rest of the world.