参考答案：C

解析：同义辨析。satisfactory令人满意的：The result of the match was highly satisfactory．比赛结果非常令人满意。satisfy使满足：I offered him $1,000 to keep quiet，but that did not satisfy him and he wanted even more．我给了他一千美元让他保持沉默，但他并不满足，他还要更多的钱。satisfied满意的，满足的：I'm not fully satisfied with the standard of your work．我对你的工作水准不太满意。satisfying令人满意的，使人满意的：It's an immensely satisfying job．这是一个非常令人满意的工作。