The correct option is A. All of the chart characteristics describe the Mississippi River.
The Mississippi is a long river in the center of the United States that flows south through ten states (Minnesota, Wisconsin, Iowa, Missouri, Illinois, Kentucky, Tennessee, Arkansas, Mississippi and Louisiana) until it drains into the Gulf of Mexico, near New Orleans. It has a length of 3734 km.
Agriculture and varied industries depend on the Mississippi. Although human beings have used it as a navigable way to move from one place to another and establish trade, it was from the arrival of the colonizers that it became an essential route for the shipment of coal, steel, oil and agricultural products.
Of all commercial products, cotton was the most important until the beginning of the 20th century, but agriculture in the soil of its basin continued to be a prominent economic activity. Other important crops have been rice, corn, peanuts, sugar cane, potatoes, hay and wheat.
Mexican immigrants is your answer.
Midwestern farmers traveling to Southwest America would be entering into Mexico (before the Mexican-American War), which included present-day Texas stretching to present-day California.
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