The city of Butte, Montana, is situated in an area rich in minerals. The area was settled by prospectors who came to mine gold in the 1860s. Later, silver- and copper-mining brought prosperity to the area. The town is named for a nearby butte, or flat-topped hill.
Which detail is least relevant to someone researching the history of Montana mining?
A.
The town is named after a nearby butte, or flat-topped hill.
B.
Butte, Montana, is in an area rich in minerals.
C.
