idk why it changed B to a sunglasses emoji, but I meant to say B!

Hi @ ! I thought something similar to you, but I think what was helpful for me was understanding that A only works if you also assume that people switched to use another product, but we don't have any evidence in the stim to support this assumption. Maybe people in group A stopped smoking, but people in group B started using snuff. Here, it's not necessarily true that people in group A switched to another product. In fact, if there are two different demographics (A and B), for instance, there could still be another alternative explanation even if AC A is true. Also, I know J.Y. says it in the explanation video, but the conclusion is about people who smoke cigarettes. Even if people decreased their usage of other tobacco products, it wouldn't matter if the conclusion in the argument only applies to cigarettes. Hope this helps!

#help

I'm still a little confused on why answer choice C is correct. The claim of the argument is that wood-burning stoves are more dangerous than open fireplaces. C says that open fireplaces pose more risk of severe accidents inside the home than do wood-burning stoves. But severe accidents inside the home is only a subset of all accidents that presumably contribute to the danger of either type of fire source. It might turn out, for instance, that open fireplaces really do pose a greater risk of accidents inside the home, but such accidents only account for 1% of all accidents involving open fireplaces. Moreover, this allows for the fact that there were relatively few accidents involving open fireplaces. It only says that the likelihood of a more severe accident is greater for open fireplaces than wood-burning stoves. So, it could be true that, on the whole, there are more accidents (even more severe accidents) involving wood-burning stoves.

Plus, again presumably couldn't one type of fire source be, in fact, more dangerous, even if it had a lower likelihood of causing a severe accident? This is because it may cause less severe accidents more frequently.

What am I missing here that will reconcile this problem? Thanks in advance for any help you can provide!