Answer:C. In Honolulu, the Buffalo Soldiers broke down some racial barriers and endured dangerous working conditions to build the Mauna Loa Trail.
Step-by-step explanation:
Based on the given options, the statement that best reflects the development of the central idea of the text is: "C"
This statement highlights the central idea that the Buffalo Soldiers played a significant role in the construction of the Mauna Loa Trail, overcoming racial barriers and facing challenging working conditions in Honolulu.