Select the correct answer.
Which statement best reflects the development of the central idea of the text?

A.
The Buffalo Soldiers built the Mauna Loa trail as part of their vacation exercises while they were in Honolulu.
B.
Bad weather and primitive working conditions led many of the Buffalo Soldiers to become overworked and underappreciated.
C.
In Honolulu, the Buffalo Soldiers broke down some racial barriers and endured dangerous working conditions to build the Mauna Loa Trail.
D.
Businessman Lorrin Thurston and geologist Thomas Jaggar built the Mauna Loa Trail with the help of the Buffalo Soldiers.