单项选择题:
The monitor theory, which is very popular among foreign language teachers in （）, was put forward by Stephen Krashen in the late 1970s.
A. America B. Britain C. China D. France
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答案：A
解析:自我监测说(The monitor theory)是美国学者克拉申于20世纪70年代后期提出的，在美国的外语教师中颇为流行。