The long-lasting war, filled with blood and deaths, ended in people’s sadness, _______ no result.
选A. reached
The long-lasting war 主语
(which was) filled with blood and deaths, ended in people’s sadness, 定语从句, 修饰war;
reached 谓语
no result 宾语
所以, 可以排除BCD,答案为A选项.