A is the only answer which contains information included in Passage A.
As I went through the choices to eliminate incorrect answers, once I found no inclusion of the answer in Passage A, I crossed it out and wasted no time looking for it in Passage B. This approach helped me move more quickly than looking at each answer to see if there was a discrepancy between the two passages. That was the way I had previously been approaching these types of questions.
For answer E, which is the answer I chose during the test, I initially thought that lines 23 - 27 would be an "instance in which people have been wronged by being treated as they treat others." However, the summary of those lines is actually more that being lied to by a pathological liar is not a sufficient reason in itself to lie back to them, because the results of the lies from the pathological liar are harmless. The fact that the lies are harmless should inform the decision of whether to lie back. No mention of how it will harm the pathological liar.