In October of 1867, five Native American tribes, including the Comanch

In October of 1867, five Native American tribes, including the Comanche met with a U.S. delegation at Medicine Lodge Creek in Texas. What were the four other tribes and who led the U.S. delegation?

A) Kiowa, Naishan, Cheyenne, and Arapaho. William Tecumseh Sherman led the delegation.
B) Cheyenne, Sioux, Kiowa, and Naishan. General George Custer led the delegation.
C) Navaho, Kiowa, Naishan and Cheyenne. General Ulysses S. Grant led the delegation.
D) Apache, Kiowa, Naishan and Sioux. William Tecumseh Sherman led the delegation.

ANSWER
Answer: A