There was a look on her face when she met with the problem. A. confusing; confusing B.

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A. confusing; confusing
B. confused; confused
C. confusing; confused
(答案→)D. confused; confusing
解析：句意：当他遇到这个令人困惑的问题时候，他脸上露出了困惑的表情。Confusing令人困惑的；一般修饰物，confused困惑的，一般修饰人和与人有关的面容，表情，眼神等，所以选D。