What was the significance of Whipple's survey of Indian Territory?

Question

A: It identified the territory that was not suitable for the transcontinental railroad
B: It was used to build relationships between the government and American Indians
C: It was used to map out the transcontinental railroad
D: It provided an overview of the United States in the 1850s

Answer 1

A: It identified the territory that was not suitable for the transcontinental railroad