What was the significance of the Battle of Cabin Creek?

Question

A: It was the first all-indian battle of the Civil War
B: It was the first battle of the Civil War in Indian Territory
C: It was the first battle of the Civil War in which Indian troops participated
D: It was the first battle of the Civil War in which black, white, and Indian troops fought side by side.

Answer 1

B: It was the first battle of the Civil War in Indian Territory