Test analysis: this question examines the ability to obtain material information. From the stem of the question, "The provisions in the Old Testament that American troops can suppress Japanese riots and riots have been deleted", we can draw a conclusion that Japan's right to suppress riots and riots is exercised by the Japanese government, and the United States no longer interferes. Combined with the topic "but both sides must negotiate on this", it can be seen that Japan has gained greater autonomy, so item B is correct.