The problem with D is that we do not know if accuracy of responses has any effect on sales and profits. We have no information about this. Just because the responses aren't always accurate, it doesn't explain why their profits would have gone down during the study.
C is better, because it tells us that surveys don't cause a decline in profits, but rather they are in indicator of declining profits. This businesses that are doing well are not receiving complaints, so they are not using surveys. The businesses that are struggling are receiving complaints, so they issue a survey. This explains the difference between the two groups examined in the study.
NikhiAugust 4, 2022
Hi, why can't it be E, since if the alternative codes contains provisions that are criticized for being obscure and unnecessary, isn't that not good, so doesn't it weaken?
Emil-KunkinAugust 7, 2022
Hi @nikhi, is this response intended for this question? I think there's nothing about obscure codes here
