英语问题The boy said to his mother in an --- voice that she shou

英语问题The boy said to his mother in an ___ voice that she shouldn't have blamed him.
为什么?
A．injury
B．injurious
C．injured
D．injuring
似乎这道题目集中到了ed 和 ing 的用法上面了？选C的人居多，可是我觉得sosedison 说的也挺有道理的。说 injured有受委屈的意思，可能是试卷的参考答案错了吧，参考答案是选D的。