Economist: In 2015, the average per-person amount paid for goods and services purchased by consumers in Country X was the equivalent of $17,570 in United States dollars, just 30 percent of the corresponding figure of $58,566 for Country Y. Yet in 2015, there was already a substantial middle class in Country X that had discretionary income for middle-class consumer goods such as new vehicles, computers, or major household appliances, while a significant portion of the middle class in Country Y did not have sufficient income to purchase such items.
Which of the following, if true, most helps explain the discrepancy in the relationships described by the economist?
A.There are many consumer goods, such as household appliances, that are produced in Country X to be sold in the Country Y market.
B.The volume of trade between Country X and Country Y is increasing rapidly in both directions.
C.The economy of Country Y is recovering from a downturn that affected both Country Y and Country X.
D.Country X residents pay much less than their Country Y counterparts for housing, transportation, and child care.
E.In Country Y as well as in Country X, there are few assembly-line jobs in factories that pay a middle-class wage.
正确答案：D Argument Construction
Situation An economist points out that even though in 2015 the average per-person amount paid for goods and services in Country X was only 30 percent of the corresponding figure in Country Y, a substantial middle class in Country X had discretionary income for consumer goods whereas a substantial portion of the middle class in Country Y did not.
Reasoning What, if true, would most help explain the discrepancies described by the economist?
Information indicating that residents in Country X pay much less for nondiscretionary items than do residents of Country Y would help explain why, even though people in Country Y pay on average three times more for goods and services than people in Country X, Country X has a more substantial middle class capable of buying discretionary goods than does Country Y.
Correct. That people in one nation pay far less for nondiscretionary goods than people in another nation would potentially be helpful in explaining how the people in the former nation would more easily be able to afford discretionary goods.