The little child sounded ______. It’s ______ to think how easily children can be hurt.

A. frightened; frightened       B. frightening; frightened

C. frightened; frightening      D. frightening; frightening

答案为C。这里面前一句 frightened 怎么才能表明是主语 child 的心理感受呢，顺便讲一下第二个空怎么才能给别人讲明白，谢谢！