![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
Why did it take many years to finish Mount Rushmore?
A.
There were many arguments about which faces to carve into the mountain.
B.
The Civil War began and the workers had to go fight the war.
C.
The snow and money problems slowed progress on the monument.
D.
Gutzon Borglum moved back to Belgium to retire.