To maintain that South Koreans are dumping their VCRs in the United States is to maintain that: ( )
选项：

A:The cost of manufacturing VCRs in Korea is lower in Korea than in the United States since wages are lower in Korea
B:The cost of manufacturing VCRs in Korea is higher in Korea than in the United States since wages are higher in Korea
C:Koreans are selling VCRs in the United States below their production cost
D:Koreans are selling VCRs in the United States above their production cost