A:Since very few judges teach or give lectures,(潜在推论:POTENTIAL candidates will not be affected due to the CURRENT situation,即A选项 )
SO
C: the ban will have little or no negative effect (argue that a certain change will have a positive effect merely by pointing to the absence of negative effects,即C选项)
总的说,我觉得A是pat论证的不足之处,而C 是 A的结果,归根结底是因为A这个不足之处,才会得出 the ban will have little or no negative effect 这个结论。即A是万恶之源,C只是A的表现