I believe I get the argument:
Challenger: Hey, you promise an increase of 8% employment. I concede that this has occurred yet this has occurred due to "new comers." 8% did not occur among those who have lived here.
Mayor: Hey, calm down. Who cares? 8% is still an attractive number.
Mayor is definitely trolling here, not answering challenger's answer: which is why C is true.
Not sure about E though; as a matter of fact, I don't think I am accurately understanding it. Is it saying that the Mayor is claiming that the belief that the challenger holds was never mentioned or implied by his argument?
In other words,
Mayor is saying: "Hey, you are claiming A, but your argument never implied or asserted A!"