题目内容：
在本文我们首先提出了一种新的AKE协议，然后分析了其安全性，最后讨论了与该协议相关的一些问题。
A.In this paper, we first propose a new AKE protocol, then its security is analyzed, and finally some issues concerning the protocol are discussed.
B.This paper first proposes a new AKE protocol, then analyzes its security, and finally some issues concerning the protocol are discussed.
C.In this paper, we first propose a new AKE protocol, then analyze its security, and finally discuss some issues concerning the protocol.
D.In this paper, we first propose a new AKE protocol, then analyze its security, and finally some issues concerning the protocol are discussed.
参考答案：