Answer:
Juan de Onate was the explorer who first visited the US river, the river is the Rio Grande. In 1598 he crossed the Rio Grande in El Paso. From there he sent out small parties in all directions to search for treasure that did not exist
Explanation:
Since 1848, the Rio Grande has marked the boundary between Mexico and the United States from the twin cities of El Paso, Texas, and Ciudad Juárez, Chihuahua, to the Gulf of Mexico.
The cause was a earthquake named The <span>Sumatra–Andaman earthquake </span>
Here is what i've gathered from online.
"The Mississippi River flows from its starting point in Minnesota to the Gulf of Mexico, which means it flows south."
I hope i helped, i only researched because i wanted to be sure with my answer.
d is the correct answer I belive. hope this helped>>