For Whom the Bell Tolls clearly represents a new beginning in Emest Hemingway's career as writer, which concerns a volunteer American guerrilla Robert Jordan fighting in ______.

For Whom the Bell Tolls clearly represents a new beginning in Emest Hemingway's career as writer, which concerns a volunteer American guerrilla Robert Jordan fighting in ______.

A.the Spanish Civil War

B.the American Civil War

C.World War I

D.World War Ⅱ

正确答案是A