The correct answer is D) Lost Generation writers became pacifists and mostly wrote books condemning World War I.
The answer that identifies how World War I influenced the Lost Generation of writers is "Lost Generation writers became pacifists and mostly wrote books condemning World War I."
The term "Lost Generation" was used by Ernest Hemingway in his book "The Sun Also Rises" of 1926. The term was applied to the writer's generation of post-World War 1 time, whose authors showed disillusionment with government leaders and wrote with cynism about the consequences of the war. The most famous writers of the Lost Generation were Ernest Hemingway, Gertrude Stein, T.S. Elliot, and F. Scott Fitzgerald.