About PT52 Sec3 #6 answer choice (b), it is wrong because it does not matter whether consumers 'continue' to buy the products or not? They can keep buying it, for instance, at lower prices? Also, comparison of the price increase ('higher taxes' vs 'some other reason') somehow does not weaken the stimulus? I'm not sure, though.
It seems like you have already answered to the similar question, but I cannot find it in answer central! Please help. Thanks in advance:)