What conclusion can be drawn from the last paragraph of the passage about researches condu
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What conclusion can be drawn from the last paragraph of the passage about researches conducted concerning ageism？
A．The author is trying to make something clear about their differences.
B．The author is demonstrating some of the differences between them.
C．The author is discussing the result of different methodologies employed.
D．The author is trying to make some conclusive researches by himself.
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正确答案：A
解析：按照第四段A brief discussion of the major methodological errors of problems found in ageism research may be helpful in clarifying this point．