What does World War I symobolize in Europe during the last century？（Choose all that apply.）

What does World War I symobolize in Europe during the last century？（Choose all that apply.）
A.The collapse of the old world order.
B.The rebirth of the Eastern countries.
C.The beginning of European decline.
D.The birth of modernity.
正确答案：The collapse of the old world order.The birth of modernity.