[单项选择]

Many United States companies have, unfortunately, made the search for legal protection from import competition into a major line of work. Since 1980 the United States International Trade Commission (ITC) has received about 280 complaints alleging damage from imports that benefit from subsidence by foreign governments. Another 340 charge that foreign companies "dumped" their products in the United States at “less than fair value”. Even when no unfair practices are all alleged, the simple claim that an industry has been injured by imports is sufficient grounds to seek relief.
Contrary to the general impression, this quest for import relief has hurt more companies than it has helped. As corporations begin to function globally, they develop an intricate Web of marketing, production, and research relationships. The complexity of these relationships makes it unlikely that a system of import relief laws will meet the strategic needs of all the units under t
A. it presents a recommendation based on the evidence presented earlier
B. it discusses an exceptional case in which the results excepted by the author of the passage were not obtained
C. it introduces an additional area of concern not mentioned earlier
D. it cites a specific case that illustrates a problem presented more generally in the previous paragraph