单选题 As the trial went on, the story behind the murder slowly ______ itself.
【正确答案】 D
【答案解析】unfold意为“伸展，开花，呈现”，符合题意。convict证明…有罪，宣告…有罪；haunt常去，常到，萦绕心头；release释放，解放，放弃，让与，免除，发表。