试题题干
President Abraham Lincoln issued the （）, because he realized that he could win support for the Union home and abroad by making the war a just war against slavery.
参考答案
正确答案：
试题解析
亚伯拉罕·林肯总统发布了《解放黑人奴隶宣言》，因为他意识到通过使战争成为反对奴隶制的正义战争，他可以赢得国内外联盟的支持。