Dumping refers to the behavior of a monopoly capitalist to sell products at prices that are much lower than domestic and foreign markets, or even lower than the cost of production, in order to defeat competitors and seize foreign markets. Which of the following acts are dumped:. ['A Chinese silk export company launched a "buy one get one free" promotion in five European countries in order to open up sales.', "Jiangsu's washing powder prices are generally cheaper than Zhejiang.", 'In order to squeeze the national industry across China, Japanese camera equipment companies sell their plastics to Chinese consumers for less than five yuan.', 'U. S. wheat exported to China was sold at the original price of seven because the road was damaged by water.']