GRE考试

根据网考网考试中心的统计分析，以下试题在2018/4/26日GRE考试习题练习中，答错率较高，为：52%
【单选题】According to the passage, "infralimbic neurons … fire to the tone only when rats are recalling extinction on the following day" (lines 7-9) for which of the following reasons


A．Extinction has not been proven to erase the memory of fear conditioning in rats.
B．The extinction response requires a number of days to develop.
C．The subject's original fear response was not conditioned to a tone.
D．The infralimbic cortices carry the memory of fear extinction.
E．(E) Rats that show the least fear demonstrate the greatest increase in infralimbic tone responses.