Use the passage to answer the question. From the Journal of John Ordway November 30, 1804 "He Informed us that a party of the Sauix nation had attacked a party of the Mandans. they killed 1 man on each Side Several more wounded, but the Souix Robbed the party of Manden of their horses 5 or 6 this being done lately our officers thought it best to offer the Mandeans some assistance if they were disposed to fight the Souix." Which of the following is the most likely reason the Corps of Discovery took the position recounted in the passage? A.
The Sioux traded with the Corps, while the Mandan did not.

B.
The Mandan had peaceful relations with the Corps, while the Sioux did not.

C.
The Sioux had trained warriors, while the Mandan did not.

D.
The Mandan had 5–6 horses, while the Sioux did not.

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These are the vilest miscreants of the savage race, and must ever remain the

pirates of the Missouri, until such measures are pursued, by our government, as

will make them feel a dependence on its will for their supply of merchandise."

—William Clark, 1804

On August 30, 1806, as the homeward-bound Lewis and Clark expedition swept down the Missouri near present-day Yankton, South Dakota, the explorers caught sight of more than one hundred well-armed Indians lining the northeast river bank. Salutes of greeting were fired by both parties as the expedition pulled up its canoes on the southwest bank. But the initial welcome vanished when Clark discovered that the Indians were Brulé Sioux of Black Buffalo's band. [1] The captain had hoped the Indians were Poncas, Omahas, or perhaps Yankton Sioux . But once their Brulé identity was known, he turned on them with his own brand of invective.

Taking instructions from Clark, the interpreter René Jusseaume shouted across the river that the Sioux were "bad people" and that "if any [came] near our camp we should kill them certainly." In a second barrage, Clark had Jusseaume tell the Brulés that future traders would be "sufficiently strong to whip any vilenous party who dare[d] to oppose them." As a parting shot, Clark notified the Sioux that the Americans had given guns, ammunition, and even a cannon to the Mandans and Hidatsas—weapons that would surely be turned against Brulé raiders. While most of the Indians retreated in the face of Clark's bombast, several warriors remained on a hill, hooting, jeering, and proclaiming their readiness to kill the Americans.

Toward sunset, one man, probably Chief Black Buffalo, came to the water's edge and invited the expedition to come across. Untongarabar, or Black Bull Buffalo, is known in more recent literature as Black Bull. Lewis and Clark consistently called him Black Buffalo. He remained a powerful force in Brulé politics and Missouri River trade until his death in July 1813. When Clark ignored his request, the Indian returned to the top of the hill and angrily struck the ground three times with his gun. "This I am informed," wrote Clark drily, "is a great oath among the Indians."

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