“如果您现在预订，可以享受八折优惠。”以下英语表达正确的是？

“如果您现在预订，可以享受八折优惠。”以下英语表达正确的是？
A.We could offer you 20% discount if you reserve now.
B.We could offer you 80% discount if you reserve now.
C.You are 20% off if you reserve the ticket now.
D.You are 80% off if you reserve the ticket now.
正确答案：AC