Another similarity between legitimate business and its illegal counterpart is price fluctuation. Just as the prices of products traded legally vary with quality and market conditions such as supply and demand, so do the prices of goods go up and down in the smuggling trade. Consider the price of drugs. Heroin and cannabis, in whatever form or by whatever name, cone in several grades, each with a going price. The wholesale price at which big dealers sell to big dealers is less than the street price. When the authorities are successful in reducing the supply buy seizures, the price of all grades rises.

　　1. The main idea for this passage is

　　[A]. The Comparison between Legitimate Business and Its Illegal Counterpart.

　　[B]. The similarities between Legitimate Business and Smuggling.

　　[C]. Smugglers May Make Great Profit from Both Activities.

　　[D]. The Boss in Smuggling Syndicate is a Chief Executive.

　　2. When is the price going down?

　　[A]. The quality of the foods and market condition are not very well.

　　[B]. The quality of goods and market condition vary.

　　[C]. Unbalance between supply and demand.

　　[D]. The price of other goods fluctuates.

　　3. It can be inferred that a smuggler

　　[A]. may make plan and establish international contacts.

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