GRE考试

根据网考网考试中心的统计分析，以下试题在2019/1/9日GRE考试习题练习中，答错率较高，为：34%
【单选题】According to the passage, behavioral psychologists studying the extinction process have discerned which of the following


A．The exact length of time required for a fear response to become extinct in a human subject
B．The effect of tone conditioning in comparison with other forms of stimuli
C．The possible effects of surgical operations on the infralimbic cortice
D．The potential of tone conditioning in treating undesirable fear responses
E．(E) The limits of Pavlov's contribution to modern behavioral psychology