题目内容：
Which of the following describes the sequence of Dr Gino and Dr Wiltermuth's research?__________
A．candle test, adding-up test, word association test. B．candle test, word association test, adding-up test.
C．adding-up test, candle test, word association test.
D．adding-up test, word association test, candle test.
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答案解析：