The argument concludes that the number of automobiles imported from our country to Bordland has increased. This conclusion is based on the evidence that Bordland dropped tariffs on automobiles, but the number of automobiles sold in Bordland has remained the same, and the number of automobile assemblers in Bordland has dropped.
To evaluate the assumption, let's analyze each option:
A. Automobiles assembled in our country are preferred in Bordland to automobiles assembled in Bordland.
Explanation: This option suggests a preference for imported automobiles, which could explain why the number of imported automobiles increased. However, this is not necessary for the conclusion to hold, because the conclusion focuses on trade statistics, not consumer preferences.
Not necessary for the argument.
B. The number of automobile assemblers in our country has increased by at least as much as the number of automobile assemblers in Bordland has decreased.
Explanation: This statement tries to link the change in the number of assemblers to the change in trade statistics. However, the argument doesn’t depend on changes in the number of assemblers in our country; it is about Bordland's imports from our country increasing.
Not necessary for the argument.
C. The average number of hours it takes a Bordland automobile assembler to assemble an automobile has not decreased significantly during the last twelve months.
Explanation: If the time to assemble an automobile in Bordland had decreased, then Bordland might have maintained or increased production despite the drop in the number of assemblers. For the conclusion to hold (that Bordland is importing more automobiles from our country), it must be assumed that Bordland’s production hasn’t become more efficient, allowing the drop in assemblers to affect production and thus require more imports.This assumption is necessary.
D. The number of automobiles assembled annually in our country has increased.
Explanation: This option focuses on whether production in our country has increased. While relevant, the conclusion concerns imports from our country to Bordland, not necessarily changes in our country's production. It’s possible Bordland is importing more even if our production remains constant.
Not necessary for the argument.
E. The difference between the hourly wage of automobile assemblers in our country and the hourly wage of automobile assemblers in Bordland is likely to decrease in the next few years.
Explanation: This statement concerns future wage trends, which is irrelevant to the immediate conclusion that the number of automobiles imported has increased.
Not necessary for the argument.
Correct Answer: COption C is the correct assumption
because the argument relies on the idea that Bordland's domestic production has not become significantly more efficient. If Bordland assemblers were able to produce more cars in less time, the drop in the number of assemblers would not necessarily lead to an increase in imports, undermining the conclusion. Therefore, for the argument to hold, Bordland’s production efficiency must have remained stable, making option C a critical assumption.