Which of the following most logically completes the argument?
Both foreign and domestic cigarettes are widely sold in the Gondian Republic, but until three years ago advertisements for foreign cigarettes were banned within the country to protect Gondian tobacco companies. Since then, the proportion of cigarette sales that are accounted for by foreign tobacco companies has not increased, even though foreign cigarettes have been heavily advertised. This does not show that brand advertising has little effect on Gondian smoking habits, however, since total cigarette consumption has risen and ___________________.
We see that the following precedes the blank:
This does not show that brand advertising has little effect on Gondian smoking habits, however, since ... ___________________.
In this type of context, "since" is followed by evidence that supports what precedes "since." So, the choice that fills the blank must support "This does not show that brand advertising has little effect on Gondian smoking habits."
Looking above in the passage to see what "this" refers to, we see the following:
the proportion of cigarette sales that are accounted for by foreign tobacco companies has not increased, even though foreign cigarettes have been heavily advertised
So, the correct answer will support the idea that the fact that foreign tobacco companies' market share has not increased even though foreign cigarettes have been advertised does not mean that brand advertising does not affect smoking habits.
In other words, the correct answer will show that, even though the proportion of cigarette sales accounted for by foreign tobacco companies has not increased, it could be that brand advertising DOES affect smoking habits.
(A) domestic cigarettes have always accounted for most cigarette sales in the Gondian Republic
The fact that domestic cigarettes have always accounted for most cigarette sales does not mean that brand advertising affects smoking habits even though the proportion of cigarette sales accounted for by foreign tobacco companies has not increased.
After all, regardless of whether domestic cigarettes have always accounted for most cigarette sales in the Gondian Republic, if brand advertising works, then we'd expect foreign companies' proportion of cigarette sales to have increased once they started advertising.
So, this choice doesn't indicate that it could be that brand advertising works.
Eliminate.
(B) Gondian tobacco companies have increased the number and sophistication of their advertisements to match those of their foreign competitors
This choice is interesting.
After all, if Gondian tobacco companies have increased the number and sophistication of their advertisements, then we could see how it could be that advertising works even though foreign companies' proportion of cigarette sales has not increased since they started advertising.
If this choice is true, it could be the case that advertising does work, but foreign companies' proportion of cigarette sales has not increased because Gondian companies responded to foreign companies advertising by advertising more themselves.
So, this choice provides reason to believe that advertising may work even though foreign companies' proportion of cigarette sales has not increased since they started advertising.
Keep.
(C) neighboring countries have also seen a rise in total cigarette consumption, even though there has been no change in regulations governing cigarette advertising in any of those countries
If anything, this choice does the opposite of what we need.
After all, if neighboring countries have also seen a rise in total cigarette consumption, even though there has been no change in regulations governing cigarette advertising in any of those countries, then the fact that total cigarette consumption in the Gondian Republic has increased no longer appears to indicate that advertising works. After all, consumption increased where advertising did not increase.
Eliminate.
(D) among the tobacco companies whose cigarettes are widely available in the Gondian Republic, the great majority are foreign companies
If anything, this choice does the opposite of what we need.
After all, if this choice is true, then a possible issue that would have kept Gondians from purchasing foreign cigarettes is eliminated. In other words, if this choice is true, then we know that it's not the case that advertising by foreign companies theoretically would work but foreign cigarettes are not widely available. So, we know that lack of availability is not the reason why foreign companies' market share did not increase.
So, this choice leaves the situation appearing to indicate that brand advertising by foreign companies does not work. After all, foreign cigarettes are available, but advertising still didn't cause foreign companies' market share to increase.
Eliminate.
(E) Gondian tobacco companies formulate their cigarettes especially to appeal to the taste of Gondian cigarette consumers
This choice is tricky because it could explain why sales of foreign cigarettes didn't increase even though foreign tobacco companies started advertising. The reason could be that Gondian tobacco companies formulate their cigarettes to appeal to the taste of Gondian cigarette consumers, so Gondian consumers buy Gondian cigarettes regardless of whether foreign companies advertise.
At the same time, the issue with this choice is that we're not simply looking for an explanation for why sales of foreign cigarettes didn't increase even though foreign tobacco companies started advertising. We're looking for information that indicates that advertising works even though the proportion of sales attributable to foreign companies didn't increase.
So, notice that the fact that Gondian tobacco companies formulate their cigarettes especially to appeal to the taste of Gondian cigarette consumers would be a reason why brand advertising DOES NOT work. It could be that advertising doesn't work because consumers choose cigarettes formulated to appeal to them regardless of how much advertising there is for other cigarettes.
So, this choice does basically the opposite of what we need: it provides a reason why foreign cigarettes companies' advertising would not work rather than supports the idea that advertising does work.
Eliminate.
Correct answer: B