rak08
Hello, I got confused between B&C, selected C because John doesn't disagree with the fact that "no US citizen who supports union labor should buy imported car" nor does he disagree that Alma is the biggest markers of importers.
So he contradicts the conclusion drawn through an alternative explanation without negating the reasoning exhibited by John
The reasoning exhibited by John includes the unsaid assumption - because Alma is the biggest maker of imports, Harry must be buying an imported car and is not sticking to his principle. Harry contradicts it by showing that the car he is buying is not imported so he is sticking to the principle. He does contradict John's reasoning.
He does not contradict John's premise that Alma is the biggest maker of imports, but he does contradict John's reasoning.