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、
(A) Extinction has not been proven to erase the memory of fear conditioning in rats.
B、
(B) The extinction response requires a number of days to develop.
C、
(C) The subject's original fear response was not conditioned to a tone.
D、
(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.
【正确答案】
D
【答案解析】
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