【单选题】一位用户致电帮助台,报告说 Windows XP 工作站启动后无法连接到网络,弹出窗口显示“连接受限或未连接”。技术人员让用户输入 ipconfig /all 命令。用户报告说 IP 地址是 169.254.69.196,子网掩码是 255.255.0.0,而对于 DNS 服务器的 IP 地址则未显示任何内容。此问题的原因是什么?
【简答题】It's said that the agreement ______ between the two companies last month will become effective from May 1st. A) to sign B) signed C) to be signed D) signing