The childhood of Tom Sawyer and Huck Finn in the Mississippi is a record of a vanished way of life in the（） Mississippi valley.

The childhood of Tom Sawyer and Huck Finn in the Mississippi is a record of a vanished way of life in the（） Mississippi valley.
A、pre-War of Independence
B、post-War of Independence
C、pre-Civil War
D、post-Civil War
正确答案：C