In the last decade, per capita consumption of cigarettes decreased substantially in Barritonia. Over the same time period, the government of Barritonia started a campaign that widely publicized the long-term adverse effects of cigarette smoking. Therefore, the decline in cigarette smoking in Barritonia is attributable to the government's anti-smoking campaign.
Which of the following, if true, most strengthens the argument?Smoking went down in Barritonia during the same period the government ran an anti smoking campaign, so the argument concludes the campaign caused the decline.
(A) The government used television, radio, and social media in its anti-smoking campaign.
This shows the campaign used major channels, but it does not show it actually changed behavior. It is supportive, but not strong.
(B) During the time period, there was not an increase in the price per pack of cigarettes.
This removes a major alternative cause. Higher prices often reduce smoking, so if price did not go up, the decline is less likely to be explained by price and more likely to be explained by the campaign.
This most strengthens the causal claim.(C) Before the government's campaign, cigarette companies were mandated to alert consumers about the adverse effects of cigarettes.
This weakens the argument, because it suggests people were already being told about harms, so the government campaign may not explain the later decline.
(D) On average, the citizens of Barritonia smoke 40% fewer cigarettes than they did 10 years ago.
This just restates the decline with a number. It does not link the decline to the campaign.
(E) It is commonly acknowledged that quitting smoking produces moderate side effects, such as headaches, lethargy, dizziness, and increased appetite.
Irrelevant to whether the campaign caused the decline.
Answer: (B)