In the Early Nineteenth Century,the Explorer Stephen H.Long

In the early nineteenth century,the explorer Stephen H.Long

A) discovered the source of the Red River.
B) labeled the Great Plains the "American breadbasket."
C) inadvertently brought the United States to the brink of war with Mexico.
D) was one of the most colorful of the "mountain men."
E) agreed with the findings and conclusions of Zebulon Pike.